Monday, March 5, 2012

List of Diagnostic Trouble codes For Acura 2001 to 2006?

The details are as follows:---

Each and every code is described with proper specification.

Go through the list:----


2001-2006


3.5L V6 MFI (J35A3) VIN YD1

OBD II Trouble Code List (P0xxx Codes)
DTC P00972T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TIntake Air Temperature Sensor 2 Circuit Low Input Key on or engine running; and the PCM detected the Intake Air Temperature (IAT) Sensor 2 signal indicated less than 0.08v (Scan Tool reads 356°F) during the CCM test.Possible Causes * IAT2 signal shorted to chassis ground * IAT2 signal shorted to sensor ground circuit * IAT2 has an internal failure (it is shorted) or has failed * PCM has failed
DTC P00982T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TIntake Air Temperature Sensor 2 Circuit High Input Key on or engine running; and the PCM detected the Intake Air Temperature (IAT) Sensor 2 signal indicated more than 4.90v (Scan Tool reads -40°F) during the CCM test.Possible Causes * IAT2 signal shorted to VREF or system power * IAT2 signal circuit is open * IAT2 ground circuit is open * IAT2 has an internal failure (it is open) * PCM has failed
DTC P01071T CCM, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TManifold Air Pressure Sensor Circuit Low Input Engine started, engine running in closed loop at idle speed, and the PCM detected the MAP sensor indicated a value of 0.0" Hg during the CCM test. Note The key on, engine off MAP sensor input should be near 2.9v. Possible Causes * MAP sensor 5-volt power circuit open or shorted to ground * MAP Sensor signal circuit is shorted to ground * MAP Sensor is damaged or has failed * PCM has failed
DTC P01081T CCM, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TManifold Air Pressure Sensor Circuit High Input Engine started, engine running in closed loop at idle speed, and the PCM detected the MAP sensor indicated a value of 29.9" Hg during the CCM test. Note The key on, engine off MAP sensor input should be near 2.9v. Possible Causes * MAP sensor signal circuit is open, or the ground circuit is open * MAP sensor signal circuit shorted to 5v VREF or system power * MAP sensor is damaged (due to an open circuit) or has failed * PCM has failed
DTC P01121T CCM, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TIntake Air Temperature Sensor Circuit Low Input Key on or engine running; and the PCM detected the Intake Air Temperature (IAT) sensor signal indicated less than 0.1v (Scan Tool reads 302°F) during the CCM test.Possible Causes * IAT sensor signal shorted to chassis ground * IAT sensor signal shorted to sensor ground circuit * IAT sensor has an internal failure (it is shorted) or has failed * PCM has failed
DTC P01131T CCM, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TIntake Air Temperature Sensor Circuit High Input Key on or engine running; and the PCM detected the Intake Air Temperature (IAT) sensor signal indicated more than 4.90v (Scan Tool reads -4°F) during the CCM test.Possible Causes * IAT sensor signal shorted to VREF or system power * IAT sensor signal circuit is open * IAT sensor ground circuit is open * Sensor has an internal failure (it is open) * PCM has failed
DTC P01161T CCM, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TEngine Coolant Temperature Sensor Range/Performance DTC P0116 and P0117 not set, Engine started, and the PCM detected too much change in the ECT sensor signal in too short a period of time during the CCM Rationality test. Note The ECT sensor should read 0.47v-0.78v at hot idle speed. Possible Causes * ECT sensor ground circuit is open (fault may be intermittent) * ECT sensor signal circuit is open (fault may be intermittent) * ECT sensor is damaged or has failed (fault may be intermittent) * PCM has failed
DTC P01171T CCM, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TEngine Coolant Temperature Sensor Circuit Low Input Key on or engine running; and the PCM detected the Engine Coolant Temperature (ECT) sensor indicated less than 0.10v (Scan Tool reads more than 302°F) during the CCM test. Note The ECT sensor should read 0.47v-0.78v at hot idle speed. Possible Causes * ECT sensor signal is shorted to chassis ground * ECT sensor signal is shorted to sensor ground circuit * ECT sensor is damaged or has failed (it is shorted internally) * PCM has failed
DTC P01181T CCM, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TEngine Coolant Temperature Sensor Circuit High Input Key on or engine running; and the PCM detected the Engine Coolant Temperature (ECT) sensor indicated more than 4.90v (Scan Tool reads less than -4°F) during the CCM test. Note The ECT sensor should read 0.47v-0.78v at hot idle speed. Possible Causes * ECT sensor signal circuit is open between the sensor and PCM * ECT sensor signal circuit is shorted to VREF or system power * ECT sensor signal circuit is open between sensor and the PCM * ECT sensor is damaged or has failed (it is open internally) * PCM has failed
DTC P01221T CCM, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TThrottle Position Sensor Circuit Low Input Engine started, engine running in closed loop at idle speed, and the PCM detected the TP signal indicated less than 0.16v (Scan Tool reads less than 10%) during the CCM test. Possible Causes * TP sensor signal circuit is shorted to ground * TP sensor VREF circuit is open * TP sensor VREF circuit is shorted to ground * TP sensor is damaged (it may be shorted internally) * PCM has failed
DTC P01231T CCM, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TThrottle Position Sensor Circuit High Input Engine started, engine running under a momentary WOT condition, and the PCM detected the TP signal was more than 4.60v (Scan Tool reads more than 90%) during the CCM test. Possible Causes * TP sensor signal circuit is shorted to VREF * TP sensor signal circuit is shorted to system power * TP sensor ground circuit is open between sensor and the PCM * TP sensor is damaged or has failed * PCM has failed
DTC P01251T ECT, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TEngine Coolant Temperature Sensor Slow Response Engine started, engine running at road load for 10 minutes, and the PCM detected the ECT sensor input did not reach the correct value. Possible Causes * Inspect for low coolant level or for an incorrect coolant mixture * ECT sensor signal circuit is open or shorted (intermittent fault) * ECT sensor is damaged or has failed * PCM has failed
DTC P01282T ECT, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TCooling System Malfunction DTC P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0335, P0336, P0300, P0301-P0306, P0335, P0336, P0401, P0505, P1106, P0117, P1108, P1129, P1259 and P1519, engine started, engine running at road load for 10 minutes, and the PCM detected the ECT sensor input did not reach the correct closed loop value. Possible Causes * Inspect for low coolant level or for an incorrect coolant mixture * Check the operation of the thermostat (it may be stuck open) * TSB 02-009 (3/11/02) contains a repair procedure for this code
DTC P01311T CCM, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/THO2S-11 (Bank 1 Sensor 1) Circuit Low Input Engine started, vehicle driven in closed loop in 4th gear at cruise speed, and the PCM detected the HO2S signal was fixed at less than 0.50v (the actual value is stored in the PCM memory). Possible Causes * HO2S signal circuit is open or it is shorted to ground * HO2S may be contaminated or may have failed * Fuel supply system is too lean (fuel filter is clogged or dirty) * PCM has failed
DTC P01321T CCM, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/THO2S-11 (Bank 1 Sensor 1) Circuit High Input Engine started, vehicle driven in D4 or D5 position in closed loop at cruise speed, and the PCM detected the HO2S signal was fixed at more than 0.90v (the actual value is stored in the PCM memory). Possible Causes * HO2S signal tracking (wet/oily) in connector causing a short between the signal circuit and heater power circuit * HO2S signal circuit is open, or the ground circuit is open * HO2S heater supply circuit is open * PCM has failed
DTC P01332T O2S1, MIL YES2001, 2002, 2003, 2004, 2005Models NSX, NSX-T Engines All Transmissions A/T, M/THO2S-11 (Bank 1 Sensor 1) Circuit Slow Response Engine started, vehicle driven in closed loop in D4/D5 position at over 55 mph at steady speed, and the PCM detected the HO2S response time to switch between 300-600 mv was too slow, or that the rich to lean or lean to rich switch time was too slow. Possible Causes * Exhaust leak present in the exhaust manifold or exhaust pipes * O2S element fuel contamination * O2S element has deteriorated * PCM has failed
DTC P01332T O2S1, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models 2.2CL, 2.3CL, 3.0CL, 3.2CL, 3.2TL, TL, 3.5RL, RL, Integra, MDX Engines All Transmissions A/T, M/THO2S-11 (Bank 1 Sensor 1) Circuit Slow Response Engine started, vehicle driven in closed loop in 4th or 6th gear at over 55 mph at steady speed, and the PCM detected the HO2S response time to switch between 300-600 mv was too slow, or that the rich to lean or lean to rich switch time was too slow. Possible Causes * Exhaust leak present in the exhaust manifold or exhaust pipes * O2S element fuel contamination * O2S element has deteriorated * PCM has failed
DTC P01332T O2S1, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TAir Fuel Sensor (Bank 1 Sensor 1) Circuit Slow Response Engine started, ECT sensor input more than 158°F, vehicle driven at an engine speed from 1200-2250 rpm at a speed over 48 mph, and the PCM detected the AFS1 signal response time was too slow. Possible Causes * Exhaust leak present in the exhaust manifold or exhaust pipes * AFS1 element is loose at its mounting location * AFS1 element is contaminated or deteriorated, or it has failed * PCM has failed
DTC P01342T O2S HTR1, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TAir Fuel Sensor (Bank 1 Sensor 1) Heater Malfunction Engine started, ECT sensor input more than 158°F, and the PCM detected a problem in the AFS1 Heater circuit operation in the test. Possible Causes * AFS1 heater power circuit is open * AFS1 heater control circuit is open or shorted to power * AFS1 (heater portion) is damaged or has failed * PCM has failed
DTC P01351T O2S HTR1, MIL YES2001, 2002Models MDX Engines All Transmissions A/T, M/THO2S-11 (Bank 1 Sensor 1) Heater Circuit Malfunction Engine started, engine runtime over 80 seconds, and the PCM detected an unexpected voltage condition on the HO2S heater circuit during the CCM test. Possible Causes * HO2S heater power circuit is open (check the underhood fuse) * O2S heater ground circuit is open * O2S heater element has an open or shorted condition * PCM has failed
DTC P01352T O2S HTR1, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TAir Fuel Sensor (Bank1 Sensor 1) Heater Circuit Malfunction Engine started, ECT sensor input more than 158°F, and the PCM detected a problem in the AFS1 Heater circuit operation in the test. Possible Causes * AFS1 heater power circuit is open (check the LAFHT 15A fuse) * AFS1 heater ground circuit is open * AFS1 heater element has high resistance or an open circuit * AFS1 heater element has a shorted condition * PCM has failed
DTC P01351T O2S HTR1, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/THO2S-11 (Bank 1 Sensor 1) Heater Circuit Malfunction Engine started, engine runtime over 80 seconds, and the PCM detected an unexpected voltage condition on the HO2S heater circuit during the CCM test. Possible Causes * Main relay output (power) circuit to the heater is open * O2S heater ground circuit is open * O2S heater element has high resistance or an open circuit * O2S heater element has a shorted condition * PCM has failed
DTC P01371T CCM, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/THO2S-12 (Bank 1 Sensor 2) Circuit Low Input Engine started, vehicle driven in 4th gear at cruise speed, and the PCM detected the HO2S signal was fixed at less than 0.30v. Note The actual value where the code sets is in the PCM memory. Possible Causes * HO2S signal circuit is open * HO2S signal circuit is shorted to ground * HO2S ground circuit is open * HO2S may be contaminated or may have failed * PCM has failed
DTC P01381T CCM, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/THO2S-12 (Bank 1 Sensor 2) Circuit High Input Engine started, vehicle driven in closed loop in 4th gear at cruise speed, and the PCM detected the HO2S signal was fixed at more than 0.60v. Note The actual value where the code sets is in the PCM memory. Possible Causes * HO2S signal tracking (wet/oily) in connector causing a short between the signal circuit and heater power circuit * HO2S signal circuit is shorted to system power * HO2S heater supply circuit is open * PCM has failed
DTC P01392T O2S1, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/THO2S-12 (Bank 1 Sensor 2) Circuit Slow Response Engine started, vehicle driven in closed loop in 4th or 6th gear at over 55 mph at steady speed, and the PCM detected the HO2S response time to switch between 300-600 mv was too slow, or that the rich to lean or lean to rich switch time was too slow. Possible Causes * Exhaust leak present in the exhaust manifold or exhaust pipes * HO2S element fuel contamination * HO2S element has deteriorated * PCM has failed
DTC P01412T O2S HTR1, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/THO2S-12 (Bank 1 Sensor 2) Heater Circuit Malfunction Engine started, engine runtime over 80 seconds, and the PCM detected an unexpected voltage condition on the HO2S heater circuit during the CCM test. Possible Causes * Main relay output (power) circuit to the heater is open * O2S heater ground circuit is open * O2S heater element has high resistance or an open circuit * O2S heater element has a shorted condition * PCM has failed
DTC P01532T O2S1, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TAir Fuel Sensor (Bank 2 Sensor 1) Circuit Slow Response Engine started, ECT sensor signal more than 158°F, vehicle driven at an engine speed from 1200-2250 rpm at a speed over 48 mph, and the PCM detected the AFS2 signal response time was too slow. Possible Causes * Exhaust leak present in the exhaust manifold or exhaust pipes * AFS2 element is loose at its mounting location * AFS2 element is contaminated or deteriorated, or it has failed * PCM has failed
DTC P01542T O2S HTR1, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TAir Fuel Sensor (Bank 2 Sensor 1) Heater Malfunction Engine started, ECT sensor signal more than 158°F, and the PCM detected a problem in the AFS2 Heater circuit operation in the test. Possible Causes * AFS2 heater power circuit is open * AFS2 heater control circuit is open or shorted to power * AFS2 (heater portion) is damaged or has failed * PCM has failed
DTC P01552T O2S HTR1, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TAir Fuel Sensor (Bank1 Sensor 1) Heater Circuit Malfunction Engine started, ECT sensor input more than 158°F, and the PCM detected a problem in the AFS1 Heater circuit operation in the test. Possible Causes * AFS1 heater power circuit is open (check the LAFHT 15A fuse) * AFS1 heater ground circuit is open * AFS1 heater element has high resistance or an open circuit * AFS1 heater element has a shorted condition * PCM has failed
DTC P01571T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/THO2S-22 (Bank 2 Sensor 2) Circuit Low Input Engine started, vehicle driven in closed loop in D4/D5 position at cruise speed, and the PCM detected the HO2S signal was fixed at less than 0.30v (actual value where the code sets is in its memory). Possible Causes * HO2S signal circuit is open or shorted to ground * HO2S ground circuit is open * HO2S may be contaminated or may have failed * PCM has failed
DTC P01581T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/THO2S-22 (Bank 2 Sensor 2) Circuit High Input Engine started, vehicle driven in closed loop at cruise speed, and the PCM detected the HO2S signal was fixed at more than 0.60v. Possible Causes * HO2S signal tracking (wet/oily) in connector causing a short between the signal circuit and heater power circuit * HO2S signal circuit is open, or the ground circuit is open * HO2S heater supply circuit is open * PCM has failed
DTC P01591T O2S1, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/THO2S-22 (Bank 2 Sensor 2) Circuit Slow Response Engine started, vehicle driven in closed loop at over 55 mph at cruise speed, and the PCM detected the HO2S response time to switch from rich to lean or from lean to rich switch time was too slow. Possible Causes * Exhaust leak present in the exhaust manifold or exhaust pipes * HO2S element fuel contamination * HO2S element has deteriorated * PCM has failed
DTC P01611T O2S HTR1, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/THO2S-22 (Bank 2 Sensor 2) Heater Circuit Malfunction Engine started, engine runtime 80 seconds, and the PCM detected an unexpected voltage condition on the HO2S heater circuit. Possible Causes * Main relay power circuit to the heater is open (intermittent) * HO2S heater ground circuit is open * HO2S heater element has high resistance or has failed * PCM has failed
DTC P01712T FUEL, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TFuel System Too Lean (Bank 1) DTC P0107, P0108, P0135, P0137, P0138, P0141, P1128, P1129 and P1259 not set, engine running in closed loop, and the PCM detected the LONGFT value exceeded the calibrated lean limit value. Possible Causes * Air leaks in intake manifold, exhaust pipes or exhaust manifold * One or more injectors restricted or pressure regulator has failed * Air is being drawn in from leaks in gaskets or other seals * O2S element is deteriorated or has failed * A "fuel control" sensor is out of calibration (ECT, IAT or MAP) * PCM has failed
DTC P01722T FUEL, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TFuel System Too Rich (Bank 1) DTC P0107, P0108, P0135, P0137, P0138, P0141, P1128, P1129 and P1259 not set, engine running in closed loop, and the PCM detected the LONGFT value exceeded the calibrated rich limit. Note A high MAP sensor signal at idle can cause this code to set. Possible Causes * Base engine fault (i.e., cam timing incorrect, oil level too high) * EVAP vapor recovery system has failed (pulling vacuum) * HO2S element may be contaminated with water or alcohol * Leaking/contaminated fuel injector(s) or fuel pressure regulator * Partial engine misfire condition is present
DTC P01742T FUEL, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TFuel System Too Lean (Bank 2) DTC P0107, P0108, P0133-P0141, P0153-P0161, P0401-P0406, P2251-P2255, P2A00, P2A03 and P2279 not set, engine running in closed loop, and the PCM detected a very lean Air/Fuel condition. Possible Causes * Air leaks in intake manifold, exhaust pipes or exhaust manifold * One or more injectors restricted or pressure regulator has failed * Air is being drawn in from leaks in gaskets or other seals * Fuel control sensor is out of calibration (ECT, IAT or MAP)
DTC P01752T FUEL, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TFuel System Too Lean (Bank 2) DTC P0107, P0108, P0133-P0141, P0153-P0161, P0401-P0406, P2251-P2255, P2A00, P2A03 and P2279 not set, engine running in closed loop, and the PCM detected a very lean Air/Fuel condition. Possible Causes * Air leaks in intake manifold, exhaust pipes or exhaust manifold * One or more injectors restricted or pressure regulator has failed * Air is being drawn in from leaks in gaskets or other seals * Fuel control sensor is out of calibration (ECT, IAT or MAP)
DTC P02011T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TFuel Injector No. 1 Circuit Malfunction Engine started, and the PCM detected the identified fuel injector control circuit signal was more than the upper limit, or that it was less than the lower limit, or that no control signal was present. Possible Causes * Fuel injector 1 control circuit is open or shorted to ground * Fuel injector 1 is damaged or has failed * Main relay power supply circuit to the injector is open * Injector "driver" circuit in the PCM is damaged or has failed
DTC P02021T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TFuel Injector No. 2 Circuit Malfunction Engine started, and the PCM detected the identified fuel injector control circuit signal was more than the upper limit, or that it was less than the lower limit, or that no control signal was present. Possible Causes * Fuel injector 2 control circuit is open or shorted to ground * Fuel injector 2 is damaged or has failed * Main relay power supply circuit to the injector is open * Injector "driver" circuit in the PCM is damaged or has failed
DTC P02031T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TFuel Injector No. 3 Circuit Malfunction Engine started, and the PCM detected the identified fuel injector control circuit signal was more than the upper limit, or that it was less than the lower limit, or that no control signal was present. Possible Causes * Fuel injector 3 control circuit is open or shorted to ground * Fuel injector 3 is damaged or has failed * Main relay power supply circuit to the injector is open * Injector "driver" circuit in the PCM is damaged or has failed
DTC P02041T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TFuel Injector No. 4 Circuit Malfunction Engine started, and the PCM detected the identified fuel injector control circuit signal was more than the upper limit, or that it was less than the lower limit, or that no control signal was present. Possible Causes * Fuel injector 4 control circuit is open or shorted to ground * Fuel injector 4 is damaged or has failed * Main relay power supply circuit to the injector is open * Injector "driver" circuit in the PCM is damaged or has failed
DTC P02051T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TFuel Injector No. 5 Circuit Malfunction Engine started, and the PCM detected the identified fuel injector control circuit signal was more than the upper limit, or that it was less than the lower limit, or that no control signal was present. Possible Causes * Fuel injector 5 control circuit is open or shorted to ground * Fuel injector 5 is damaged or has failed * Main relay power supply circuit to the injector is open * Injector "driver" circuit in the PCM is damaged or has failed
DTC P02061T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TFuel Injector No. 6 Circuit Malfunction Engine started, and the PCM detected the identified fuel injector control circuit signal was more than the upper limit, or that it was less than the lower limit, or that no control signal was present. Possible Causes * Fuel injector 6 control circuit is open or shorted to ground * Fuel injector 6 is damaged or has failed * Main relay power supply circuit to the injector is open * Injector "driver" circuit in the PCM is damaged or has failed
DTC P02221T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TThrottle Position Sensor 2 Circuit Low Input Engine started, engine running in closed loop conditions, and the PCM detected the closed throttle TP2 signal was less than 0.16v (Scan Tool reads less than 10% open) during the CCM test. Possible Causes * TP2 sensor signal circuit is shorted to ground * TP2 sensor VREF circuit is open or shorted to ground * TP2 sensor is damaged (it may be shorted internally) * PCM has failed
DTC P02231T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TThrottle Position Sensor 2 Circuit High Input Engine started, and after a momentary WOT condition, the PCM detected the TP signal indicated over 4.60v (Scan Tool over 90%). Possible Causes * TP2 sensor signal circuit is shorted to VREF or system power * TP2 sensor ground circuit is open between sensor and PCM * TP2 sensor is damaged or has failed * PCM has failed
DTC P03002T MISFIRE, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TMultiple Misfire Detected DTC P0101-P0103, P0171, P0172, P0401, P1102, P1103, P1361, P1362, P1381, P1382, P1491, P1498 and P1508 not set, engine running under positive torque conditions, and the PCM detected a misfire in only one cylinder (MIL will flash if the misfire is severe). Possible Causes * Base engine mechanical fault affecting more than 1 cylinder * CKP or CMP sensor problem affecting more than one cylinder * Fuel system problem affecting more than one cylinder * Ignition system problem affecting more than one cylinder
DTC P03012T MISFIRE, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TCylinder 1 Misfire Detected DTC P0107, P0108, P0131, P0132, P0171, P0172, P1128, P0335, P0336, P0505, P1128, P1129, P1259, P1361, P1362, P1366, P1367 and P1519 not set, engine running under positive torque conditions, and the PCM detected a misfire condition in one cylinder. Note If the misfire is severe, the MIL will flash on/off on the 1st trip! Possible Causes * Air leak in the intake manifold, or in the EGR or PCM system * Base engine (mechanical) problem affecting only one cylinder * Fuel system problem affecting only one cylinder * Ignition problem (i.e., coil or spark plug) affecting one cylinder
DTC P03022T MISFIRE, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TCylinder 2 Misfire Detected DTC P0107, P0108, P0131, P0132, P0171, P0172, P1128, P0335, P0336, P0505, P1128, P1129, P1259, P1361, P1362, P1366, P1367 and P1519 not set, engine running under positive torque conditions, and the PCM detected a misfire condition in one cylinder. Note If the misfire is severe, the MIL will flash on/off on the 1st trip! Possible Causes * Air leak in the intake manifold, or in the EGR or PCM system * Base engine (mechanical) problem affecting only one cylinder * Fuel system problem affecting only one cylinder * Ignition problem (i.e., coil or spark plug) affecting one cylinder
DTC P03032T MISFIRE, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TCylinder 3 Misfire Detected DTC P0107, P0108, P0131, P0132, P0171, P0172, P1128, P0335, P0336, P0505, P1128, P1129, P1259, P1361, P1362, P1366, P1367 and P1519 not set, engine running under positive torque conditions, and the PCM detected a misfire condition in one cylinder. Note If the misfire is severe, the MIL will flash on/off on the 1st trip! Possible Causes * Air leak in the intake manifold, or in the EGR or PCM system * Base engine (mechanical) problem affecting only one cylinder * Fuel system problem affecting only one cylinder * Ignition problem (i.e., coil or spark plug) affecting one cylinder
DTC P03042T MISFIRE, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TCylinder 4 Misfire Detected DTC P0107, P0108, P0131, P0132, P0171, P0172, P1128, P0335, P0336, P0505, P1128, P1129, P1259, P1361, P1362, P1366, P1367 and P1519 not set, engine running under positive torque conditions, and the PCM detected a misfire condition in one cylinder. Note If the misfire is severe, the MIL will flash on/off on the 1st trip! Possible Causes * Air leak in the intake manifold, or in the EGR or PCM system * Base engine (mechanical) problem affecting only one cylinder * Fuel system problem affecting only one cylinder * Ignition problem (i.e., coil or spark plug) affecting one cylinder
DTC P03052T MISFIRE, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TCylinder 5 Misfire Detected DTC P0107, P0108, P0131, P0132, P0171, P0172, P1128, P0335, P0336, P0505, P1128, P1129, P1259, P1361, P1362, P1366, P1367 and P1519 not set, engine running under positive torque conditions, and the PCM detected a misfire condition in one cylinder. Note If the misfire is severe, the MIL will flash on/off on the 1st trip! Possible Causes * Base engine (mechanical) problem affecting only one cylinder * Fuel system problem affecting only one cylinder * Ignition problem (i.e., coil or spark plug) affecting one cylinder
DTC P03062T MISFIRE, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TCylinder 6 Misfire Detected DTC P0107, P0108, P0131, P0132, P0171, P0172, P1128, P0335, P0336, P0505, P1128, P1129, P1259, P1361, P1362, P1366, P1367 and P1519 not set, engine running under positive torque conditions, and the PCM detected a misfire condition in one cylinder. Note If the misfire is severe, the MIL will flash on/off on the 1st trip! Possible Causes * Air leak in the intake manifold, or in the EGR or PCM system * Base engine (mechanical) problem affecting only one cylinder * Fuel system problem affecting only one cylinder * Ignition problem (i.e., coil or spark plug) affecting one cylinder
DTC P03251T CCM, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TKnock Sensor 1 Circuit Malfunction Engine started, engine running for 1 minute, and the PCM detected an unexpected voltage condition on the Bank 1 Knock sensor circuit.Possible Causes * Knock sensor signal circuit is open (rear bank of engine) * Knock sensor signal circuit is grounded (rear bank of engine) * Knock sensor not tightened properly * Knock sensor damaged or has failed (it may be open internally) * PCM has failed
DTC P03272T CCM, MIL YES1996, 1997, 1998, 1999Knock Sensor Circuit Low Input Engine started, engine runtime over 10 seconds, system voltage from 11-16v, ECT sensor more than 140°F, engine speed from 2000-4000 rpm, throttle angle over 5%, and the PCM detected the Knock Sensor (KS) signal indicated less than 0.20v, or indicated ore than 4.8v for over 15 seconds during the CCM test. Possible Causes * KS signal circuit is open or shorted to ground * KS signal circuit is shorted to VREF or system power (B+) * Knock Sensor is damaged or has failed * PCM has failed
DTC P03351T CCM, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TCKP Sensor 1 Circuit Malfunction (No Signal) Engine cranking or running; and the PCM did not detect any signals from the Crankshaft Position (CKP) Sensor 1 during the test. Note The engine will crank for a longer period of time, may buck or jerk, but it will start and run without the CKP sensor signal present. Possible Causes * CKP1 sensor signal circuit is open * CKP1 sensor is shorted to ground * CKP1 sensor is damaged or has failed * PCM has failed
DTC P03361T CCM, MIL YES2001, 2002Models MDX Engines All Transmissions A/T, M/TCKP Sensor 1 Circuit Intermittent Signal Engine started, and the PCM detected an unexpected interruption in the CKP Sensor 1 signal in the CCM test. Possible Causes * CKP1 sensor signal circuit is open (intermittent) * CKP1 sensor is shorted to ground (intermittent) * CKP1 sensor is damaged or has failed (intermittent fault) * PCM has failed
DTC P03391T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TCKP Sensor 'A' Circuit Intermittent Signal Engine started, and the PCM detected an unexpected interruption in the CKP Sensor 'A' signal during testing.Possible Causes * CKP 'A' sensor signal circuit is open (intermittent) * CKP 'A' sensor is shorted to ground (intermittent) * CKP 'A' sensor is damaged or has failed (intermittent fault) * PCM has failed
DTC P03401T CCM, MIL YES2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TCamshaft Position Sensor Circuit No Signal Engine started, CKP sensor signals received, and the PCM detected an intermittent loss of the CMP sensor signal. Possible Causes * CMP sensor signal circuit is open (intermittent fault) * CMP sensor signal circuit is shorted to ground (Intermittent) * CMP sensor is damaged or has failed (intermittent fault) * PCM has failed
DTC P03441T CCM, MIL YES2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TCamshaft Position Sensor Circuit Intermittent Signal Engine started, and the PCM detected an unexpected interruption of the CMP sensor signal during testing. Possible Causes * CMP Sensor 1 is damaged or has failed * CMP Sensor 1 signal circuit is open or shorted to ground * Engine timing belt has a skipped teeth condition * PCM has failed
DTC P03851T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TCamshaft Position Sensor 'B' Circuit Malfunction Engine started, CKP sensor signals received, and the PCM detected a loss of the CMP sensor 'B' signal during testing. Possible Causes * CMP sensor 'B' circuit is open * CMP sensor 'B' circuit is shorted to ground * CMP sensor 'B' is damaged or has failed * PCM has failed
DTC P03891T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TCamshaft Position Sensor 'B' Circuit Intermittent Signal Engine started, CKP sensor signals received, and the PCM detected an intermittent loss of the CMP Sensor 'B' signal. Possible Causes * CMP sensor signal 'B' circuit is open (intermittent fault) * CMP sensor signal 'B' circuit is shorted to ground (Intermittent) * CMP sensor 'B' is damaged or has failed (intermittent fault) * PCM has failed
DTC P04012T EGR1, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TEGR System Insufficient Flow Detected Cold engine startup (ECT sensor less than 76°F at startup), engine running in closed loop at 40-55 mph for 5 minutes in high gear followed by a deceleration period back to 35 mph for 5 seconds with the throttle closed, and the PCM detected a signal from the EGR position sensor that indicated insufficient EGR flow during the test.Possible Causes * EGR valve source vacuum supply line open or restricted * EGR exhaust manifold passages are clogged or restricted * EGR valve assembly or solenoid valve damaged or has failed * PCM has failed
DTC P04032T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TEGR Solenoid Control Circuit Malfunction Key on or engine running; and the PCM detected an unexpected voltage condition on the EGR solenoid after it was cycled from "on" to "off". The solenoid resistance is 6.3-6.7 ohms. Possible Causes * EGR solenoid control circuit open or shorted to ground * EGR solenoid control circuit shorted to VREF or system power * EGR solenoid is damaged or has failed * PCM has failed (the EGR solenoid driver may be open/shorted)
DTC P04042T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TEGR Solenoid Control Circuit Range/Performance Engine started, engine running at cruise speed in closed loop, and the PCM did not detect the correct amount of change in the EGR valve position sensor signal after the valve was cycled "on" to "off". Possible Causes * EGR valve source vacuum supply line clogged (remove EGR valve plate to gain access to the manifold port that is clogged) * EGR valve or exhaust manifold passages are restricted * EGR solenoid connector is disconnected or damaged
DTC P04062T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TEGR Valve Position Sensor Circuit High Input Key on or engine running; and the PCM detected an unexpected "high" voltage condition (more than 4.88v) on the EGR valve position sensor signal circuit during the CCM test. Possible Causes * EGR valve position sensor circuit is open * EGR valve position sensor circuit is shorted to VREF or power * EGR valve position sensor is damaged or has failed * PCM has failed
DTC P04203TCAT1, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TCatalyst Efficiency Below Thresholds (Bank 1) DTC P0137, P0138 and P0141 not set, engine running in closed loop at 40-55 mph for 2 minutes, followed by a deceleration period to 35 mph at closed throttle, and the PCM detected excessive activity in the Catalyst oxygen sensor (Bank 1) in the Catalyst Monitor test. Possible Causes * Air leaks in at the exhaust manifold or exhaust pipes * Catalytic converter damaged or has failed (deteriorated) * Front HO2S is more aged than the rear HO2S (HO2S is lazy) * PCM has failed
DTC P04303TCAT1, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TCatalyst Efficiency Below Thresholds (Bank 2) DTC P0157, P0158 and P0161 not set, engine started, ECT sensor signal more than 158°F, vehicle driven in closed loop at 50-55 mph for 2 minutes, and the PCM detected excessive activity in the rear HO2S-22 during the Catalyst Monitor test. Possible Causes * Air leaks in at the exhaust manifold or exhaust pipes * Catalytic converter is damaged or has failed (deteriorated) * Front HO2S is more aged than the rear HO2S (HO2S is lazy) * Fuel quality is poor or fuel is contaminated * PCM has failed
DTC P04431T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TEVAP Canister Purge Valve Circuit Malfunction Engine started, and PCM detected an unexpected voltage condition on the EVAP canister purge solenoid after it was cycled from "on" to "off". The solenoid resistance is 26-28 ohms. Possible Causes * EGR solenoid control circuit open or shorted to ground * EGR solenoid control circuit shorted to VREF or system power * EGR solenoid is damaged or has failed * PCM has failed (the EGR solenoid driver may be open/shorted)
DTC P04512T CCM, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TFuel Tank Pressure Sensor Circuit Range/Performance Engine started, and the PCM detected the fuel tank pressure (FTP) sensor signal was less than the allowable range stored in the PCM memory (i.e., a calibrated range adjusted to current conditions). Note The FTP sensor PID should be near 2.5v with the fuel cap off. Possible Causes * FTP sensor vacuum lines loose, damaged or disconnected * Fuel tank pressure sensor is damaged or has failed * PCM has failed
DTC P04521T CCM, MIL YES1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TFuel Tank Pressure Sensor Circuit Low Input Key on or engine running; and the PCM detected the fuel tank pressure (FTP) sensor signal was less than 0.16v during the test. Note The FTP sensor PID should be near 2.5v with the fuel cap off. Possible Causes * FTP sensor signal circuit is shorted to ground * FTP sensor vacuum lines loose, damaged or disconnected * Fuel tank pressure sensor is damaged or has failed * PCM has failed
DTC P04531T CCM, MIL YES1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TFuel Tank Pressure Sensor Circuit Low Input Key on or engine running; and the PCM detected the fuel tank pressure (FTP) sensor signal was less than 0.16v during the test. Note The FTP sensor PID should be near 2.5v with the fuel cap off. Possible Causes * FTP sensor signal circuit is shorted to ground * FTP sensor vacuum lines loose, damaged or disconnected * Fuel tank pressure sensor is damaged or has failed * PCM has failed
DTC P04552T EVAP1, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TEVAP System Very Large Leak (0.080") Detected IAT sensor signal from 32-86°F at startup, ECT signal over 154°F during testing, engine runtime over 10 minutes, TP sensor signal from 1-4v, vehicle driven to a speed of over 20 mph at an engine speed over 1200 rpm, then with both the purge and vent solenoids closed, the PCM detected a large amount of change in the fuel tank pressure during the EVAP leak test. Possible Causes * Fuel tank cap damaged, loose or the wrong part number * Fuel tank leaks at the fuel fill pipe or at the fuel tank seals * Fuel vapor control valve is damaged or has failed * Fuel tank vapor recirculation valve or vapor tube is damaged * Fuel tank vapor control vent tube is damaged or has failed
DTC P04562T EVAP1, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TEVAP System Very Small Leak (0.020") Detected IAT sensor signal from 32-86°F at startup, vehicle driven at over 5 mph for over 2 minutes, then with ECT sensor signal more than 154°F and the EVAP Control and Vent solenoids enabled, the PCM detected the fuel tank pressure was incorrect due to a leak in the fuel tank area during the EVAP Monitor Leak Test. Possible Causes * Fuel tank cap damaged, loose or the wrong part number * Fuel tank leaks at the fuel fill pipe or at the fuel tank seals * Fuel vapor control valve is damaged or has failed * Fuel tank vapor recirculation valve or vapor tube is damaged * Fuel tank vapor control vent tube is damaged or has failed
DTC P04572T EVAP1, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TEVAP System Leak Detected (Fuel Cap Loose Or Off) Engine started, engine running at a speed of more than 5 mph for over 1 minute, and the PCM detected a fuel tank pressure value that indicated a leak present the fuel tank area due to a missing fuel cap. Possible Causes * Fuel tank cap damaged, loose or the wrong part number * Fuel tank leaks at the fuel fill pipe or at the fuel tank seals * Fuel vapor control valve is damaged or has failed * Fuel tank vapor recirculation valve or vapor tube is damaged * Fuel tank vapor control vent tube is damaged or has failed
DTC P04612T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TFuel Level Sensor Circuit Range/Performance Key on or engine running; and the PCM detected an unexpected high or low voltage condition on the Fuel Gauge Unit circuit during the CCM test. Possible Causes * Fuel gauge circuit is open, shorted to ground or to power * Fuel gauge unit is damaged or has failed * PCM has failed
DTC P04621T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TFuel Level Sensor Circuit Low Input Key on or engine running; and the PCM detected an unexpected low voltage condition (less than 0.05v) on the Fuel Gauge Unit circuit. Possible Causes * Fuel gauge circuit is open, shorted to ground * Fuel gauge unit is damaged or has failed * PCM has failed
DTC P04631T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TFuel Level Sensor Circuit High Input Key on or engine running; and PCM detected an unexpected high voltage condition (less than 0.05v) on the Fuel Gauge Unit circuit. Possible Causes * Fuel gauge circuit is shorted to power * Fuel gauge unit is damaged or has failed * PCM has failed
DTC P04962T EVAP1, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TEVAP Canister System High Purge Flow IAT sensor signal from 32-86°F at startup, vehicle driven at over 5 mph for over 2 minutes, then with the EVAP canister purge solenoid "on", the PCM detected the fuel tank pressure was incorrect due to a high purge flow condition. The EVAP Function test can also be used. Possible Causes * EVAP canister purge valve has a poor connection * EVAP canister purge valve is damaged or has failed * EVAP canister vent valve has a poor connection * Fuel tank pressure sensor has a poor connection
DTC P04972T EVAP1, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TEVAP Canister System Low Purge Flow IAT sensor signal from 32-86°F at engine startup, vehicle driven at over 5 mph for over 2 minutes, then with the EVAP Control solenoid enabled, the PCM detected the fuel tank pressure was incorrect due to a low purge flow condition. The EVAP Function test can be used. Possible Causes * Check for leaks or restrictions in the canister purge vacuum line between the canister purge valve and the in take manifold * Check the vacuum line from canister to the solenoid for leaks * EVAP canister purge valve is damaged or has failed * Check the FTP, purge solenoid and vent solenoid connections
DTC P04981T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TEVAP Canister Vent Shut Valve Control Circuit Low Voltage Key on or engine running; and the PCM detected an unexpected low voltage condition on the EVAP canister vent shut valve control circuit during the CCM test. The solenoid resistance is 25-30 ohms at 68°F. Possible Causes * EVAP canister vent shut valve control circuit shorted to ground * EVAP canister vent shut valve power circuit is open (test fuse) * EVAP canister vent control circuit is open * EVAP canister vent control circuit is damaged or has failed * PCM has failed
DTC P04991T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TEVAP Canister Vent Shut Valve Control Circuit High Voltage Key on or engine running; and the PCM detected an unexpected high voltage condition on the EVAP canister vent shut valve control circuit during testing. The solenoid resistance is 25-30 ohms at 68°F. Possible Causes * Check for loose connections at the EVAP canister vent shut valve (i.e., check the control and ground circuit connections) * Check for a loose EVAP vent shut valve connection at the PCM * PCM has failed
DTC P05051T CCM, MIL YES1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TIdle Speed Control System DTC P1519 not set, engine started, engine running at hot idle, and the PCM detected the Actual idle speed and the Target idle speed were too far apart during the CCM Rationality test. Possible Causes * IAC valve circuit open, shorted to ground or to power (B+) * IAC valve is damaged or has failed * Fast idle thermo valve is damaged or has failed (some models) * Throttle body is dirty or full of sludge (clean and then retest) * PCM has failed * TSB 03-006 (3/17/03) contains a repair procedure for this code
DTC P05061T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TIdle Speed Control System Lower Than Expected Engine started, ECT sensor input over 158°F, vehicle not moving, Fuel Trim from 0.73 to 1.47, and the PCM detected the Actual idle speed was more than 100 rpm lower than the Target idle speed. Possible Causes * IAC valve may be damaged or have failed * Throttle body bore/plate dirty or full of sludge (clean and retest) * Throttle body is damaged * PCM is damaged or has failed
DTC P05071T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TIdle Speed Control System Higher Than Expected Engine started, ECT sensor input over 158°F, vehicle not moving, Fuel Trim from 0.73 to 1.47, and the PCM detected the Actual idle speed was more than 100 rpm higher than the Target idle speed. Possible Causes * IAC valve may be damaged or have failed * Inspect for any air intake system leaks in the engine or hoses * Throttle body bore/plate dirty or full of sludge (clean and retest) * PCM is damaged or has failed
DTC P05631T CCM, MIL YES2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TPCM Power Source Circuit Unexpected Voltage Key on or engine running; and the PCM detected an unexpected loss of voltage condition on the PCM power source circuit during the CCM test. Possible Causes * PCM power source circuit is open or shorted to ground * PCM power source circuit has high resistance * PCM has failed
DTC P06031T PCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TPCM Internal Module Keep Alive Memory Error Key on or engine running; and the PCM detected a problem in the Keep Alive Memory (KAM) portion of its internal interface. Possible Causes * Clear codes and recheck for this trouble code. If it resets, update the PCM to the latest software. Then recheck for the same trouble code. If it resets, substitute a known good PCM to determine if the PCM has failed and is causing the code.
DTC P06061T PCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TPCM Processor Error Key on or engine running; and the PCM detected a problem in its internal processor. Possible Causes * Clear codes and recheck for this trouble code. If it resets, update the PCM to the latest software. Then recheck for the same trouble code. If it resets, substitute a known good PCM to determine if the PCM has failed and is causing the code.
DTC P06271T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TPGM-FI Main Relay 2 (Fuel Pump) Circuit Malfunction Key on or engine running; and the PCM detected an unexpected voltage condition on the PGM-FI main relay control circuit. Possible Causes * PGM-FI main relay control circuit is open or shorted to ground * PGM-FI main relay power circuit is open (check the fuse) * PGM-FI main relay is damaged or has failed * PCM is damaged or has failed
DTC P06411T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TPCM Sensor Reference Voltage 'A' Circuit Malfunction Key on or engine running; and the PCM detected an unexpected low voltage condition on the Sensor Reference Voltage 'A' circuit. Possible Causes * One or more of these related sensors or circuits (APP1, APP2, MAP, or Counter Shaft Speed sensor) circuits might be shorted to ground. Disconnect one sensor at a time, clear the codes and then recheck for the same trouble code to determine which sensor is causing this trouble code to set. * PCM is damaged or has failed
DTC P06511T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TPCM Sensor Reference Voltage 'B' Circuit Malfunction Key on or engine running; and the PCM detected an unexpected low voltage condition on the Sensor Reference Voltage 'B' circuit. Possible Causes * One or more of these related sensors or circuits (EGR Valve Position, Mainshaft Speed, FTP or the TAC module) circuits might be shorted to ground. Disconnect one sensor at a time, clear the codes and then recheck for the same trouble code to determine which sensor is causing this trouble code to set. * PCM is damaged or has failed
DTC P06571T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TAir Fuel Sensor Power Relay Circuit Malfunction Key on or engine running; and the PCM detected an unexpected voltage condition on the Air Fuel Sensor power relay control circuit. Possible Causes * AFS power relay control circuit is open or shorted to ground * AFS relay power circuit is open (check the No. 9 LAF HT fuse) * AFS power relay is damaged or has failed * PCM is damaged or has failed
DTC P06851T PCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TPCM Power Control Circuit Malfunction Key on or engine running; and the PCM detected an unexpected voltage condition on the Air Fuel Sensor power relay control circuit. Possible Causes * Clear codes and recheck for this trouble code. If it resets, update the PCM to the latest software. Then recheck for the same trouble code. If it resets, substitute a known good PCM to determine if the PCM has failed and is causing the code.
DTC P07101T CCM, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/TAutomatic Transmission Fluid Circuit Malfunction Key on or engine running; and the PCM detected an unexpected voltage condition on the ATF sensor signal circuit during the test.Possible Causes * ATF sensor signal is open between the sensor and the PCM * ATF sensor signal is shorted to sensor or chassis ground * ATF sensor connector is disconnected or damaged * ATF sensor is damaged or has failed * PCM has failed
DTC P07151T CCM, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/TA/T Mainshaft Speed Sensor Circuit Malfunction Engine running with VSS inputs received, and the PCM detected an unexpected voltage condition on the Mainshaft speed sensor circuit. Possible Causes * Mainshaft speed sensor circuit is open or shorted to ground * Mainshaft speed sensor circuit is shorted to VREF or power * Mainshaft speed sensor connector is disconnected or damaged * Mainshaft speed sensor is damaged or has failed * PCM has failed
DTC P07201T CCM, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/TA/T Countershaft Speed Sensor Circuit Malfunction Engine started, vehicle driven to over 30 mph for several minutes, and the PCM detected an unexpected voltage condition on the Countershaft Speed Sensor circuit during the CCM test. Possible Causes * Countershaft speed sensor circuit is open or shorted to ground * Countershaft speed sensor circuit is shorted to VREF or power * Countershaft speed sensor connector is disconnected or damaged * Countershaft speed sensor is damaged or has failed * PCM has failed
DTC P07301T CCM, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/TAutomatic Transaxle Shift Control System No other A/T trouble codes set, engine started, vehicle driven at cruise speed with VSS inputs received, and the PCM detected the lockup clutch did not lock or unlock correctly during the CCM test. Possible Causes * One or more A/T clutch pressure control switches is damaged * Refer to the repair instructions in a transmission repair manual or the information in other electronic media to repair this code.
DTC P07401T CCM, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/TAutomatic Transaxle Lockup Clutch System Malfunction No other A/T trouble codes set, engine started, vehicle driven at cruise speed with VSS inputs received, and the PCM detected the lockup clutch did not engage or disengage correctly during the test. Possible Causes * Possible problem in the transmission or torque converter * Refer to the repair instructions in a transmission repair manual or the information in other electronic media to repair this code.
DTC P07481T CCM, MIL YES2002, 2003, 2004, 2005, 2006A/T Clutch Pressure Control Solenoid 'A' Circuit Malfunction Engine started, vehicle driven at cruise speed, and the PCM detected an unexpected voltage condition on the A/T Clutch Pressure control solenoid 'A' circuit during the CCM test period. Possible Causes * Clutch pressure control solenoid 'A' circuit is shorted to ground * Clutch pressure control solenoid 'A' is damaged or has failed * Clear codes and recheck for this trouble code. If it resets, update the PCM to the latest software. Then recheck for the same trouble code. If it resets, substitute a known good PCM to determine if the PCM has failed and is causing the code.
DTC P07531T CCM, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/TA/T Lockup Solenoid 'A' Circuit Malfunction Engine started, engine running at cruise speed with VSS inputs, and the PCM detected an unexpected voltage condition on the Solenoid Valve 'A' circuit during the CCM test. Possible Causes * A/T Solenoid 'A' control circuit is open or shorted to ground * A/T Solenoid 'A' control circuit is shorted to system power * A/T Solenoid 'A' connector is disconnected or damaged * A/T Solenoid 'A' is damaged or has failed * TCM or PCM has failed
DTC P07581T CCM, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/TA/T Lockup Solenoid 'B' Circuit Malfunction Engine started, engine running at cruise speed, and the PCM detected an unexpected voltage condition on the A/t Solenoid Valve 'B' circuit during the CCM test. Possible Causes * A/T Solenoid 'B' circuit is open, shorted to ground or to power * A/T Solenoid 'B' control circuit is shorted to system power * A/T Solenoid 'B' connector is disconnected or damaged * A/T Solenoid 'B' is damaged or has failed * TCM or PCM has failed
DTC P07631T CCM, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/TA/T Lockup Solenoid 'C' Circuit Malfunction Engine started, engine running at cruise speed, and the PCM detected an unexpected voltage condition on the A/T Solenoid Valve 'C' circuit during the CCM test. Possible Causes * A/T Solenoid 'C' circuit is open, shorted to ground or to power * A/T Solenoid 'C' connector is disconnected or damaged * A/T Solenoid 'C' is damaged or has failed * TCM or PCM has failed
DTC P07801T CCM, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/TAutomatic Transaxle System Malfunction Engine started, vehicle driven at cruise speed for several minutes, and the PCM detected an Automatic Transaxle fault. Note This trouble code sets with along with several TCM related trouble codes. Possible Causes * Refer to the repair instructions in a transmission repair manual or the information in other electronic media to repair this code.

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Fig.
OBD II Trouble Code List (P1xxx Codes)
DTC P10771T CCM, MIL YES2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TIntake Manifold Runner Control System (Low RPM) Malfunction Engine started, vehicle driven at cruise speed and then back to idle speed, and the PCM detected a problem in the IMRC system at low engine speed during the CCM test. If P0651 is also set, repair it first. Possible Causes * IMRC component failure affecting low engine speed operation * IMRC solenoid is damaged or stuck at low engine speed * PCM has failed
DTC P10781T CCM, MIL YES2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TIntake Manifold Runner Control System (High RPM) Malfunction Engine started, vehicle driven at cruise speed and then back to idle speed, and the PCM detected a problem in the IMRC system at high engine speed during the CCM test. Possible Causes * IMRC component failure affecting high engine speed operation * IMRC solenoid is damaged or stuck at high engine speed * PCM has failed
DTC P11061T CCM, MIL YES1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/TBARO Pressure Sensor Circuit Range/Performance Engine started, engine running in 4th gear and accelerated under wide-open-throttle conditions, and the PCM detected the BARO sensor signal did not change enough under these test conditions. Possible Causes * BARO sensor signal circuit is open or shorted to ground * BARO sensor ground circuit has high resistance * BARO sensor is damaged or it may be out of calibration * PCM has failed
DTC P11071T CCM, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/TBARO Pressure Sensor Circuit Low Input Key on or engine running; and the PCM detected an unexpected "low" voltage on the BARO sensor circuit during the CCM test. Possible Causes * BARO sensor signal circuit is shorted to signal ground * BARO sensor signal circuit is shorted to chassis ground * BARO sensor is damaged (it may be shorted internally) * BARO sensor signal circuit to the TCM is open or grounded * TCM or the PCM has failed
DTC P11081T CCM, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/TBARO Pressure Sensor Circuit High Input Key on or engine running; and the PCM detected an unexpected "high" voltage on the BARO sensor circuit during the CCM test.Possible Causes * BARO sensor signal circuit shorted to VREF * BARO sensor signal circuit is shorted to system power (B+) * BARO sensor is damaged (it may be open internally) * BARO sensor signal circuit to the TCM is shorted to power * TCM or the PCM has failed
DTC P11211T CCM, MIL YES1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TTP Sensor Signal Lower Than Expected Engine started, and the PCM detected the TP sensor was lower than the expected value with the throttle wide open (i.e., the Scan Tool reads less than 14.1% under these conditions) during the CCM Test.Possible Causes * TP sensor signal circuit is shorted to ground between the PCM and the TCM * TP sensor is damaged or has failed * PCM has failed
DTC P11221T CCM, MIL YES1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006Models MDX RSX Engines All Transmissions A/T, M/TTP Sensor Signal Higher Than Expected Engine started, and the PCM detected the TP sensor was more than the expected value with the throttle wide open (i.e., the Scan Tool reads more than 16.5% under these conditions) during the CCM Rationality test.Possible Causes * TP sensor signal circuit is open or shorted to VREF between the PCM and the TCM * TP sensor is damaged or has failed * PCM has failed
DTC P11281T CCM, MIL YES1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TMAP Sensor Signal Lower Than Expected Engine started, engine running at cruise speed and then back to idle speed, and the PCM detected a MAP sensor signal was less than the expected value during the CCM Rationality Test.Possible Causes * MAP sensor signal circuit shorted to ground (intermittent fault) * MAP sensor vacuum line bent or plugged at intake manifold * MAP sensor is damaged or it is out-of-calibration * PCM has failed
DTC P11291T CCM, MIL YES1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TMAP Sensor Value Higher Than Expected Engine started, engine running at cruise speed and then back to idle speed, and the PCM detected a MAP sensor signal was higher than the expected value during the CCM Rationality Test.Possible Causes * Check for signs of a vacuum leak at the PCV valve or hose, the engine mount vacuum hose, brake booster and throttle body * MAP sensor signal circuit shorted to VREF (intermittent fault) * MAP sensor is damaged or it is out-of-calibration * PCM has failed
DTC P12971T CCM, MIL YES1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/TElectrical Load Detector Circuit Low Input Engine running at hot idle speed or at cruise speed, headlights "on", and the PCM detected the ELD signal was less than a stored value. Possible Causes * ELD sensor signal circuit is open or shorted to ground * ELD sensor power circuit is open or shorted to ground * ELD sensor is damaged or has failed * PCM has failed
DTC P12981T CCM, MIL YES1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/TElectrical Load Detector Circuit High Input Engine running at hot idle speed or at cruise speed, headlights "on", and the PCM detected the ELD signal was more than a stored value. Possible Causes * ELD sensor signal circuit is shorted to VREF * ELD sensor signal circuit is shorted to system power (B+) * ELD sensor is damaged or has failed * PCM has failed
DTC P13661T CCM, MIL YES1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/TTop Dead Center Sensor 2 Circuit Intermittent Signal Engine started, and the PCM detected an unexpected (intermittent) interruption of the Top Dead Center 2 (TDC2) sensor signal. Possible Causes * TDC2 signal circuit is open (intermittent fault) * TDC2 signal circuit is shorted to ground (intermittent fault) * TDC2 pickup assembly or its pulse rotor is damaged (intermittent fault) * TDC2 is damaged or has failed (intermittent fault) * PCM has failed
DTC P13671T CCM, MIL YES1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/TTop Dead Center Sensor 2 No Signal Engine cranking or running; and the PCM did not detect any signals from the Top Dead Center 2 (TDC2) sensor during the CCM test. Note The engine will start and run without the TDC sensor 2 signal. Possible Causes * TDC2 signal circuit is open or shorted to ground * TDC2 pickup assembly or its pulse rotor is damaged * TDC2 is damaged or has failed * PCM has failed
DTC P14501T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TEVAP Two-Way Valve Bypass Valve Control Circuit Low Input Key on or engine running; and the PCM detected an unexpected low voltage condition on the EVAP two-way bypass valve control circuit. Possible Causes * 2-Way bypass valve control circuit is open * 2-Way bypass valve control power circuit is open (test the fuse) * 2-Way bypass control valve is damaged or has failed * PCM is damaged or has failed
DTC P14511T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TEVAP Two-Way Valve Bypass Valve Control Circuit High Input Key on or engine running; and the PCM detected an unexpected high voltage condition on the two-way bypass valve control circuit. Possible Causes * 2-Way bypass valve control circuit is shorted to system power * 2-Way bypass control valve is damaged or has failed * PCM is damaged or has failed
DTC P14541T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TFuel Tank Pressure Sensor Circuit Range/Performance Key on or engine running; and the PCM detected an unexpected voltage condition on the fuel tank pressure sensor signal circuit. Possible Causes * FTP sensor circuit is open or shorted (intermittent fault) * FTP sensor air tube is clogged with debris or dirt * Fuel tank pressure sensor is damaged or has failed * PCM is damaged or has failed
DTC P14562T EVAP1, MIL YES1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TEVAP System Leak Detected (Fuel Tank Area) IAT sensor signal from 32-86°F at startup, vehicle driven to a speed over 5 mph for 2-3 minutes, ECT sensor signal over 154°F, then with the EVAP Control and Vent solenoids "on", the PCM detected an incorrect fuel tank pressure value due to a leak in the fuel tank area. Possible Causes * Fuel tank cap damaged, loose or the wrong part number * Fuel tank leaks at the fuel fill pipe or at the fuel tank seals * Fuel vapor control valve is damaged or has failed * Fuel tank vapor recirculation valve or vapor tube is damaged * Fuel tank vapor control vent tube is damaged or has failed * TSB 02-005 (2/18/02) contains a repair procedure for this code
DTC P14572T EVAP1, MIL YES1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TEVAP System Leak Detected (Canister Area) Cold startup completed (IAT sensor signal from 32-86°F at engine startup), vehicle driven at over 5 mph for over 2 minutes, then with ECT sensor signal more than 154°F and the EVAP Control and Vent solenoids enabled, and the PCM detected an invalid fuel tank pressure value due to a leak in the canister area in the Leak Test. Possible Causes * EVAP canister is leaking, damaged or full of water * EVAP canister purge line is loose, damaged or blocked * EVAP two-way valve or ORVR vent shut valve is damaged * EVAP fuel tank vapor control valve is damaged or has failed * PCM has failed * TSB 03-001 (1/27/03) contains a repair procedure for this code
DTC P14601T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TFuel Level Sensor Power Supply Circuit Malfunction Key on or engine running; and the PCM detected an unexpected voltage condition on the fuel level sensor power supply circuit. Possible Causes * Fuel level sensor power circuit is open or shorted to ground * Fuel level sensor circuit to fuel gauge assembly is damaged * Fuel level sensor is damaged or has failed * PCM is damaged or has failed
DTC P14862T ECT, MIL YES2000, 2001, 2002, 2003, 2004, 2005, 2006Cooling System Malfunction DTC P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0335, P0336, P0401, P0500, P0505, P1106, P1107, P1108, P1128, P1129, P1253, P1257, P1258, P1259, P1359, P1399, P1491, P1498 and P1519 not set, vehicle driven for over 10 minutes, and the PCM detected the ECT signal did not reach the correct closed loop value. Note This trouble code can set if the engine remains under hot idle conditions with the hood open for an extended period of time. Possible Causes * ECT sensor is out of calibration * Check for low coolant level or incorrect coolant mixture * Cooling system component failure (thermostat stuck open) * TSB 01-016 (9/10/01) contains a repair procedure for this code
DTC P14912T EGR1, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TEGR Valve Lift Sensor Insufficient Flow Detected Engine started, vehicle driven while in closed loop at 1700-2500 rpm for at least 10 minutes, and the PCM detected the EGR valve lift sensor (EGRV) signal indicated insufficient EGR flow during the EGR Monitor test. Possible Causes * EGR valve lift sensor is stuck, damaged or has failed * EGR control solenoid circuit is open or shorted to ground * EGR control solenoid valve is damaged or has failed * PCM has failed
DTC P14981T CCM, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TEGR Valve Lift Sensor Circuit High Input Key on or engine running; and the PCM detected the EGR Valve Lift sensor signal was more than an allowable range stored in memory. Possible Causes * EGR valve lift sensor circuit is open or shorted to power * EGR valve lift sensor is shorted to VREF or system power (B+) * EGR valve lift sensor is stuck, damaged or has failed * PCM has failed
DTC P15081T CCM, MIL YES2001, 2002Models 2.2CL, 3.2CL, 3.5RL, Integra, MDX Engines All Transmissions A/T, M/TIdle Air Control Valve Circuit Malfunction Key on or engine running; and the PCM detected an unexpected voltage condition on the IAC valve control circuit during the test. Possible Causes * IAC valve control circuit is open or shorted to ground * IAC valve control circuit is shorted to system power (B+) * IAC valve power circuit is open or shorted to ground * IAC valve is damaged or has failed * PCM has failed * TSB 03-006 (3/17/03) contains a repair procedure for this code
DTC P15191T CCM, MIL YES1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TIdle Air Control Valve Circuit Malfunction Key on or engine running; and the PCM detected an unexpected voltage condition on the Idle Air Control (IAC) valve control circuit. Possible Causes * IAC valve circuit is open, shorted to ground or to system power * IAC valve power circuit is open or shorted to ground * IAC valve is damaged or has failed * PCM is damaged * TSB 03-006 (3/17/03) contains a repair procedure for this code
DTC P16071T PCM, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TPCM Internal Circuit Malfunction Key on, and the PCM detected a fault in one of its internal circuits. Note This trouble code indicates an internal failure in the PCM. The OEM repair procedure recommends replacing the original PCM with a "known good" PCM and then verify the code does not reset. Possible Causes * PCM is damaged or has failed
DTC P16561T CCM, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/TPCM To VSA Unit Signal Line Circuit Malfunction Engine started, and the PCM detected an unexpected voltage condition on the PCM to VSA circuit during the CCM test. Possible Causes * SEFA or SEAF signal line is open or shorted to ground * SEFA or SEAF signal line is shorted to system power * TCM or PCM has failed
DTC P16831T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TThrottle Valve Default Position Spring Range/Performance Key on or engine running; and the PCM detected an unexpected voltage condition on the throttle valve position during the CCM test. Do not check the throttle valve position spring action with the key on. Possible Causes * Check for a binding throttle valve position spring * Check for dirt and sludge on the throttle body causing the throttle valve default position to indicate an incorrect value
DTC P16841T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TThrottle Valve Default Position Spring Range/Performance Key on or engine running; and the PCM detected an unexpected voltage condition on the throttle valve position during the CCM test. Do not check the throttle valve position spring action with the key on. Possible Causes * Check for a binding throttle valve position spring * Check for dirt and sludge on the throttle body causing the throttle valve default position to indicate an incorrect value
DTC P17061T CCM, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/TA/T Transmission Range Switch Circuit No Gear Inputs Engine started, vehicle driven and the PCM detected an unexpected high voltage condition on the Gear Position Switch circuit. Note The D4 or D5 indicator on the dash will flash 6 times if this code is set. Possible Causes * A/T gear position switch signal circuit is shorted to ground * A/T gear position switch signal circuit is shorted to another wire * A/T gear position switch is damaged or has failed * TCM or PCM has failed
DTC P17061T CCM, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/TA/T Transmission Range Switch Circuit No Gear Inputs Key on or engine running; and the PCM detected an unexpected "high" voltage condition on the Gear Position Switch circuit. Possible Causes * A/T gear position switch signal circuit is open * A/T gear position switch ground circuit is open * A/T gear position switch is shorted to VREF or system power * A/T gear position switch is damaged or has failed
DTC P17101T CCM, MIL NO2000, 2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/TA/T First Hold Switch Circuit Malfunction Key on or engine running; and the PCM detected an unexpected voltage condition on the First Hold switch circuit during the test. Possible Causes * First hold witch signal circuit is open * First hold switch is shorted to ground * First hold switch ground circuit is open * First hold switch is shorted to VREF or system power * First hold switch is damaged or has failed * TCM or PCM has failed
DTC P17391T CCM, MIL NO1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/TA/T 3rd Pressure Switch Circuit Malfunction Engine running in gear, and the PCM detected an unexpected voltage condition on the 3rd pressure switch circuit during the test. Possible Causes * A/T 3rd pressure switch signal circuit is open * A/T 3rd pressure switch signal circuit is shorted to ground * A/T 3rd pressure switch signal circuit shorted to system power * A/T 3rd pressure switch is damaged or has failed * TCM or PCM has failed
DTC P17401T CCM, MIL NO2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/TA/T 4th Pressure Switch Circuit Malfunction Engine running in gear, and the PCM detected an unexpected voltage condition on the 4th pressure switch circuit during the test. Possible Causes * A/T 4th pressure switch signal circuit is open * A/T 4th pressure switch signal circuit is shorted to ground * A/T 4th pressure switch signal circuit shorted to system power * A/T 4th pressure switch is damaged or has failed * TCM or PCM has failed
DTC P17501T CCM, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/TA/T Hydraulic Pressure Control Malfunction (Mechanical) Engine started, engine running in gear, and the PCM detected a mechanical fault existed in the hydraulic portion of the A/T (as it relates to Shift Solenoids 'A' and 'B') during the CCM test. Note The D4 lamp on the dash will flash when this code sets. Possible Causes * Shift Solenoid 'A' is damaged or has failed * Shift Solenoid 'B' is damaged or has failed * The transmission is damaged or has failed
DTC P17511T CCM, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/TA/T Hydraulic Pressure Control Malfunction (Mechanical) Engine started, engine running in gear, and the PCM detected a mechanical fault existed in the hydraulic portion of the A/T (as it relates to Clutch Pressure Control Solenoids 'A' and 'B') during the CCM test. Note The D4 lamp on the dash will flash once when this code is set. Possible Causes * Clutch Pressure Control Solenoid 'A' is damaged or has failed * Clutch Pressure Control Solenoid 'B' is damaged or has failed * Shift Solenoid 'B' is damaged or has failed * The transmission is damaged or has failed
DTC P17531T CCM, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/TA/T Lockup Solenoid Valve 'A' Circuit Malfunction Vehicle driven in 1st, 2nd, 3rd and 4th gears, and the PCM detected an unexpected voltage condition on the Solenoid 'A' control circuit. Note The D4 lamp on the dash will flash once when this code is set. Possible Causes * Lockup solenoid 'A' control circuit is open or shorted to ground * Lockup solenoid 'A' circuit is shorted to system power * Lockup solenoid 'A' connector is disconnected or damaged * Lockup solenoid 'A' is damaged or has failed * TCM or PCM has failed
DTC P17581T CCM, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/TA/T Lockup Solenoid Valve 'B' Circuit Malfunction Vehicle driven in 1st, 2nd, 3rd and 4th gears, and the PCM detected an unexpected voltage condition on the Solenoid 'B' control circuit. Note The D4 lamp on the dash will flash twice when this code is set. Possible Causes * Lockup solenoid 'B' control circuit is open or shorted to ground * Lockup solenoid 'B' circuit is shorted to system power * Lockup solenoid 'B' connector is disconnected or damaged * Lockup solenoid 'B' is damaged or has failed * TCM or PCM has failed
DTC P17681T CCM, MIL YES2001, 2002, 2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/TA/T Lockup Solenoid Valve 'A' Circuit Malfunction Vehicle driven in 1st, 2nd, 3rd and 4th gears, and the PCM detected an unexpected voltage condition on the Solenoid 'A' control circuit. Note The D4 lamp on the dash will flash 16 times if this code is set. Possible Causes * Lockup solenoid 'A' control circuit is open or shorted to ground * Lockup solenoid 'A' circuit is shorted to system power * Lockup solenoid 'A' is damaged or has failed * TCM or PCM has failed

Click image to see an enlarged view
Fig.
OBD II Trouble Code List (P2xxx Codes)
DTC P21011T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TThrottle Actuator System Malfunction Engine started, engine running (at the speed indicated in the trouble code Freeze Frame data), and the PCM detected a signal from the TAC module indicating a problem present in the TAC system. Possible Causes * Check for loose connections at TAC module (intermittent fault) * Key off - check the throttle blade for free movement (be careful not to pinch your finger while performing this inspection step) Clean the throttle body as needed and recheck for the code * Update the PCM to the latest software. If the problem is still present, substitute a known good PCM and then retest. If the problem goes away, the original PCM has failed.
DTC P21081T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TThrottle Actuator Control Module Malfunction Key on or engine running; and the PCM detected a signal from the TAC module indicating a problem present in the TAC module. Possible Causes * Check for loose connections at TAC module (intermittent fault) * Check for loose connections at the PCM (intermittent fault) * Substitute a known good throttle body assembly and retest. If the problem goes away, the original throttle body has failed.
DTC P21181T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TThrottle Actuator Motor Current Range/Performance Engine started, vehicle driven with several changes in the throttle position angle, and the PCM detected a signal from the TAC module indicating a TAC motor current problem had occurred. Possible Causes * Check for loose connections at TAC module (intermittent fault) * Substitute a known good throttle body assembly and retest. If the problem goes away, the original throttle body has failed. * Update the PCM to the latest software. If the problem is still present, substitute a known good PCM and then retest. If the problem goes away, the original PCM has failed.
DTC P21221T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TAccelerator Pedal Position Sensor 1 Circuit Low Input Key on or engine running; and the PCM detected an unexpected low voltage condition (less than 0.1v) on the APP1 sensor signal circuit. If P0641 (low VREF) is set along with P2127, repair the P0641 first. Possible Causes * Check for loose connections at APP1 sensor (intermittent fault) * APP1 Sensor VREF circuit is open * APP1 Sensor signal circuit is shorted to ground * APP1 Sensor is damaged or has failed. * Update the PCM to the latest software. If the problem is still present, substitute a known good PCM and then retest. If the problem goes away, the original PCM has failed.
DTC P21231T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TAccelerator Pedal Position Sensor 1 Circuit High Input Key on or engine running; and the PCM detected an unexpected high voltage condition (more than 4.85v) on the APP1 sensor signal circuit. Possible Causes * Check for loose connections at APP1 sensor (intermittent fault) * APP1 Sensor signal circuit is shorted to the VREF circuit * APP1 Sensor signal circuit is open between sensor and PCM * APP1 Sensor is damaged or has failed * Update the PCM to the latest software. If the problem is still present, substitute a known good PCM and then retest. If the problem goes away, the original PCM has failed.
DTC P21271T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TAccelerator Pedal Position Sensor 2 Circuit Low Input Key on or engine running; and the PCM detected an unexpected low voltage condition (less than 0.1v) on the APP2 sensor signal circuit. If P0641 (low VREF) is set along with P2127, repair the P0641 first. Possible Causes * Check for loose connections at APP2 sensor (intermittent fault) * APP2 Sensor VREF circuit is open * APP2 Sensor signal circuit is shorted to ground * APP2 Sensor is damaged or has failed. * Update the PCM to the latest software. If the problem is still present, substitute a known good PCM and then retest. If the problem goes away, the original PCM has failed.
DTC P21281T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TAccelerator Pedal Position Sensor 2 Circuit High Input Key on or engine running; and the PCM detected an unexpected high voltage condition (more than 4.80v) on the APP2 sensor signal circuit. Possible Causes * Check for loose connections at APP2 sensor (intermittent fault) * APP2 Sensor signal circuit is shorted to the VREF circuit * APP2 Sensor signal circuit is open between sensor and PCM * APP2 Sensor is damaged or has failed * Update the PCM to the latest software. If the problem is still present, substitute a known good PCM and then retest. If the problem goes away, the original PCM has failed.
DTC P21351T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TThrottle Position Sensor 1/2 Incorrect Voltage Correlation Key on or engine running; and the PCM detected an incorrect voltage correlation on the TP1/2 sensor circuit during the CCM test. Possible Causes * Check for loose connections at TAC module (intermittent fault) * Clear the codes, and then use the Scan Tool ETCS test to check for any related trouble codes. If any codes are present, repair these trouble codes and then retest for the original code.
DTC P21381T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TAccelerator Pedal Position Sensor 1/2 Incorrect Voltage Correlation Key on or engine running; and the PCM detected an incorrect voltage correlation on the APP1/2 sensor circuit in the CCM test. Possible Causes * Check for loose connections at APP sensor (intermittent fault) * Clear the codes, and then use the Scan Tool ETCS test to check for any related trouble codes. If any codes are present, repair these trouble codes and then retest for the original code. * Update the PCM to the latest software. If the problem is still present, substitute a known good PCM and then retest. If the problem goes away, the original PCM has failed.
DTC P21761T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TThrottle Actuator Control System Idle Position Not Learned Key on or engine running; and the PCM detected an incorrect voltage correlation on the APP1/2 sensor circuit in the CCM test. Possible Causes * Check for loose connections at TAC module (intermittent fault) * Clear the codes, and then use the Scan Tool ETCS test to check the throttle valve movement with the key on, engine off and the intake air duct removed (keep your fingers clear during the inspection step). If the throttle valve does not operate to its fully closed position, substitute a known good throttle assembly and retest for the same code. If okay, clean the throttle body. * Update the PCM to the latest software. If the problem is still present, substitute a known good PCM and then retest. If the problem goes away, the original PCM has failed.
DTC P21951T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TAir Fuel Sensor 1 (Bank 1 Sensor 1) Signal Stuck Lean Engine started, vehicle driven for several minutes at various cruise speeds, and the PCM detected the AFS1 signal was stuck "lean". Possible Causes * Check for a loose AFS1 assembly (not tightened) at the exhaust pipe connection. Clear the codes and retest the code. * If DTC P2195 is present, replace the AFS1 and then retest. * If this code is an intermittent problem, check for loose connections at the AFS1 connector.
DTC P21971T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TAir Fuel Sensor 2 (Bank 2 Sensor 1) Signal Stuck Lean Engine started, vehicle driven for several minutes at various cruise speeds, and the PCM detected the AFS2 signal was stuck "lean". Possible Causes * Check for a loose AFS2 assembly (not tightened) at the exhaust pipe connection. Clear the codes and retest the code. * If DTC P2197 is present, replace the AFS1 and then retest. * If this code is an intermittent problem, check for loose connections at the AFS2 connector.
DTC P21992T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TIntake Air Temperature Sensor 1/2 Voltage Correlation Engine started cold (both IAT sensors less than 77°F), and the PCM detected the voltage correlation difference between the IAT Sensor 1 and IAT Sensor 2 was more than 45°F during the CCM test period. Possible Causes * Check for loose connections at the IAT 1/2 (intermittent fault) * Let the vehicle sit for at least 8 hours. If the code resets, replace the IAT sensor that has the largest difference from the room temperature (after testing at KOEO with a cold engine).
DTC P22271T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TBARO Sensor Circuit Range/Performance DTC P0107, P0108, P1128 and P1129 not set, ECT sensor input over 158°F, vehicle driven in Drive at a throttle angle of 12-20 degrees, and the PCM detected a problem in the BARO sensor. Possible Causes * Check for loose connections at the PCM (intermittent fault) * Update the PCM to the latest software. If the problem is still present, substitute a known good PCM and then retest. If the problem goes away, the original PCM has failed.
DTC P22281T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TBARO Sensor Circuit Low Input Key on or engine running; and the PCM detected an unexpected low voltage (less than 1.58v [53 kPa]) on the BARO sensor signal circuit. Possible Causes * Check for loose connections at the PCM (intermittent fault) * Update the PCM to the latest software. If the problem is still present, substitute a known good PCM and then retest. If the problem goes away, the original PCM has failed.
DTC P22291T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TBARO Sensor Circuit High Input Key on or engine running; and the PCM detected an unexpected high voltage (more than 4.50v [160 kPa]) on the BARO sensor signal circuit. Possible Causes * Check for loose connections at the PCM (intermittent fault) * Update the PCM to the latest software. If the problem is still present, substitute a known good PCM and then retest. If the problem goes away, the original PCM has failed.
DTC P22371T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TAir Fuel Sensor 1 (Bank 1 Sensor 1) I/P Line High Voltage DTC P0134 and P2237 not set, engine started and engine running, and the PCM detected an unexpected high voltage condition on the AFS1 I/P circuit during the CCM test. Possible Causes * Check for loose connections at the AFS1 unit (intermittent fault) * AFS1 ground circuit is open * AFS1 assembly is damaged or has failed * Update the PCM to the latest software. If the problem is still present, substitute a known good PCM and then retest. If the problem goes away, the original PCM has failed.
DTC P22381T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TAir Fuel Sensor 1 (Bank 1 Sensor 1) I/P Line Low Voltage DTC P0134 and P2237 not set, engine started and engine running, and the PCM detected an unexpected low voltage condition on the AFS1 I/P circuit during the CCM test. Possible Causes * Check for loose connections at the AFS1 unit (intermittent fault) * AFS1 signal circuit is shorted to ground * AFS1 assembly is damaged or has failed * Update the PCM to the latest software. If the problem is still present, substitute a known good PCM and then retest. If the problem goes away, the original PCM has failed.
DTC P22401T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TAir Fuel Sensor 2 (Bank 2 Sensor 1) I/P Line High Voltage DTC P0154 and P2240 not set, engine started and engine running, and the PCM detected an unexpected high voltage condition on the AFS2 I/P circuit during the CCM test. Possible Causes * Check for loose connections at the AFS2 unit (intermittent fault) * AFS2 ground circuit is open * AFS2 assembly is damaged or has failed * Update the PCM to the latest software. If the problem is still present, substitute a known good PCM and then retest. If the problem goes away, the original PCM has failed.
DTC P22411T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TAir Fuel Sensor 2 (Bank 2 Sensor 1) I/P Line Low Voltage DTC P0154 and P2240 not set, engine started and engine running, and the PCM detected an unexpected high voltage condition on the AFS2 I/P circuit during the CCM test. Possible Causes * Check for loose connections at the AFS2 unit (intermittent fault) * AFS2 ground circuit is open * AFS2 assembly is damaged or has failed * Update the PCM to the latest software. If the problem is still present, substitute a known good PCM and then retest. If the problem goes away, the original PCM has failed.
DTC P22431T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TAir Fuel Sensor 1 (Bank 1 Sensor 1) VCENT Line High Voltage DTC P2243 not set, engine started and engine running, and the PCM detected an unexpected high voltage condition on the AFS1 VCENT circuit during the CCM test. Possible Causes * Check for loose connections at the AFS1 unit (intermittent fault) * AFS1 VCENT ground circuit is open (Circuit A54) * AFS1 assembly is damaged or has failed * Update the PCM to the latest software. If the problem is still present, substitute a known good PCM and then retest. If the problem goes away, the original PCM has failed.
DTC P22451T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TAir Fuel Sensor 1 (Bank 1 Sensor 1) VCENT Line Low Voltage Engine started, and the PCM detected an unexpected low voltage condition on the AFS1 VCENT circuit during the CCM test. Possible Causes * Check for loose connections at the AFS1 unit (intermittent fault) * AFS1 VCENT signal circuit is shorted to ground * AFS1 assembly is damaged or has failed * Update the PCM to the latest software. If the problem is still present, substitute a known good PCM and then retest. If the problem goes away, the original PCM has failed.
DTC P22471T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TAir Fuel Sensor 2 (Bank 2 Sensor 1) VCENT Line High Voltage DTC P2247 not set, engine started and engine running, and the PCM detected an unexpected high voltage condition on the AFS2 VCENT circuit during the CCM test. Possible Causes * Check for loose connections at the AFS2 unit (intermittent fault) * AFS1 VCENT ground circuit is open (Circuit A50) * AFS1 assembly is damaged or has failed * Update the PCM to the latest software. If the problem is still present, substitute a known good PCM and then retest. If the problem goes away, the original PCM has failed.
DTC P22491T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TAir Fuel Sensor 2 (Bank 2 Sensor 1) VCENT Line Low Voltage Engine started, and the PCM detected an unexpected low voltage condition on the AFS2 VCENT circuit during the CCM test. Possible Causes * Check for loose connections at the AFS2 unit (intermittent fault) * AFS2 VCENT signal circuit is shorted to ground * AFS2 assembly is damaged or has failed * Update the PCM to the latest software. If the problem is still present, substitute a known good PCM and then retest. If the problem goes away, the original PCM has failed.
DTC P22511T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TAir Fuel Sensor 1 (Bank 1 Sensor 1) VS Line High Voltage Engine started, and the PCM detected an unexpected high voltage condition on the AFS1 VS circuit during the CCM test. Possible Causes * Check for loose connections at the AFS1 unit (intermittent fault) * AFS1 VS circuit is open (Circuit A53) * AFS1 assembly is damaged or has failed * Update the PCM to the latest software. If the problem is still present, substitute a known good PCM and then retest. If the problem goes away, the original PCM has failed.
DTC P22521T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TAir Fuel Sensor 1 (Bank 1 Sensor 1) VS Line Low Voltage Engine started, and the PCM detected an unexpected low voltage condition on the AFS1 VS circuit during the CCM test. Possible Causes * Check for loose connections at the AFS1 unit (intermittent fault) * AFS1 VS circuit is shorted to ground * AFS1 assembly is damaged or has failed * Update the PCM to the latest software. If the problem is still present, substitute a known good PCM and then retest. If the problem goes away, the original PCM has failed.
DTC P22541T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TAir Fuel Sensor 2 (Bank 2 Sensor 1) VS Line High Voltage Engine started, and the PCM detected an unexpected high voltage condition on the AFS2 VS circuit during the CCM test. Possible Causes * Check for loose connections at the AFS1 unit (intermittent fault) * AFS2 VS circuit is open (Circuit A49) * AFS2 assembly is damaged or has failed * Update the PCM to the latest software. If the problem is still present, substitute a known good PCM and then retest. If the problem goes away, the original PCM has failed.
DTC P22551T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TAir Fuel Sensor 2 (Bank 2 Sensor 1) VS Line Low Voltage Engine started, and the PCM detected an unexpected low voltage condition on the AFS2 VS circuit during the CCM test. Possible Causes * Check for loose connections at the AFS2 unit (intermittent fault) * AFS2 VS circuit is shorted to ground * AFS2 assembly is damaged or has failed * Update the PCM to the latest software. If the problem is still present, substitute a known good PCM and then retest. If the problem goes away, the original PCM has failed.
DTC P22791T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TIntake Air System Leak DTC P0443 not set, engine started and engine running, and the PCM detected a problem in the intake Air System (a vacuum leak). Possible Causes * Check for a vacuum leak at the PCV valve or vacuum hose * Check for a vacuum leak at EVAP purge valve vacuum hose * Check for a vacuum leak the throttle body assembly * Check for a vacuum leak at the brake booster hose * Check for a vacuum leak at the engine mount control solenoid vacuum hose * Check the camshaft timing to determine if it is correct
DTC P24132T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TEGR System Malfunction DTC P0651 not set, engine started and engine running, and the PCM detected a problem in the intake Air System (a vacuum leak). Possible Causes * Check for loose connections at EGR valve (intermittent fault) * EGR valve position sensor ground circuit is open * EGR valve position sensor VREF circuit is open or shorted * EGR valve position sensor signal circuit is open or shorted * EGR valve position sensor is damaged or has failed
DTC P24222T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TEVAP Canister Vent Shut Valve Close Malfunction DTC P0651 not set, engine started and engine running, and the PCM detected a problem in the intake Air System (a vacuum leak). Possible Causes * Check for loose connections at EVAP canister vent shut valve (intermittent fault) * EVAP canister is clogged or restricted * EVAP canister vent shut valve is damaged or has failed
DTC P25522T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TThrottle Actuator Control Module Relay Malfunction Key on or engine running; and the PCM detected an unexpected voltage condition on the TAC module relay control circuit. Possible Causes * Check for loose connections at the TAC module relay (intermittent fault) * TAC module relay control circuit is shorted to power * Throttle body assembly is damaged or has failed
DTC P26101T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/T24 Hour Time Malfunction Key on or engine running; and the PCM detected an unexpected voltage condition on the TAC module relay control circuit. Possible Causes * Clear codes and retest. If the code does not reset, the problem was an intermittent fault and is not present at this time. * Update the PCM to the latest software. If the problem is still present, substitute a known good PCM and then retest. If the problem goes away, the original PCM has failed.
DTC P26271T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TAir Fuel Sensor 1 (Bank 1 Sensor 1) Label Circuit Low Input Engine started, vehicle driven at cruise speed for 2-3 minutes in closed loop, and the PCM detected an unexpected low voltage condition on the AFS1 Label circuit during the CCM test. Possible Causes * Clear the codes and recheck for DTC P2627. If it does, check for a short to ground condition on Circuit A56. * Check for loose connections at the AFS1 (intermittent fault) * If DTC P0107, P0112, P0117, P0452, P0700, P2122, P2128 or P02630 are set, repair these trouble codes first and then retest to determine if DTC P2627 is still present.
DTC P26281T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TAir Fuel Sensor 1 (Bank 1 Sensor 1) Label Circuit High Input Engine started, vehicle driven at cruise speed for 2-3 minutes in closed loop, and the PCM detected an unexpected high voltage condition on the AFS1 Label circuit during the CCM test. Possible Causes * Check for loose connections at the AFS1 (intermittent fault) * Check for an open circuit condition on Circuit A56 * AFS2 assembly is damaged or has failed
DTC P26301T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TAir Fuel Sensor 2 (Bank 2 Sensor 1) Label Circuit Low Input Engine started, vehicle driven at cruise speed for 2-3 minutes in closed loop, and the PCM detected an unexpected low voltage condition on the AFS2 Label circuit during the CCM test. Possible Causes * Clear the codes and recheck for DTC P2630. If it does, check for a short to ground condition on Circuit A52. * Check for loose connections at the AFS1 (intermittent fault) * If DTC P0107, P0112, P0117, P0452, P0700, P2122, P2127 or P02628 are set, repair these trouble codes first and then retest to determine if DTC P2630 is still present.
DTC P26311T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TAir Fuel Sensor 2 (Bank 2 Sensor 1) Label Circuit High Input Engine started, vehicle driven at cruise speed for 2-3 minutes in closed loop, and the PCM detected an unexpected high voltage condition on the AFS2 Label circuit during the CCM test. Possible Causes * Check for loose connections at the AFS2 (intermittent fault) * Check for an open circuit condition on Circuit A52 * AFS2 assembly is damaged or has failed
DTC P26461T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TVTEC Oil Pressure Switch Circuit Low Input Engine started, and the PCM detected an unexpected low voltage condition on the VTEC oil pressure switch circuit in the CCM test. Possible Causes * Check for loose connections at VTEC switch (intermittent fault) * VTEC oil pressure switch circuit is shorted to ground * VTEC oil pressure switch is damaged or has failed * PCM has failed (substitute known good PCM and then retest)
DTC P26471T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TVTEC Oil Pressure Switch Circuit High Input Engine started, and the PCM detected an unexpected high voltage condition on the VTEC oil pressure switch circuit in the CCM test. Possible Causes * Check for loose connections at VTEC switch (intermittent fault) * VTEC oil pressure switch circuit is shorted to ground * VTEC oil pressure switch is damaged or has failed * PCM has failed (substitute known good PCM and then retest)
DTC P26481T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TVTEC Solenoid Valve Circuit Low Input Key on or engine running; and the PCM detected an unexpected low voltage condition on the VTEC solenoid valve circuit during the test. The VTEC solenoid resistance at 68°F is 14-30 ohms. Possible Causes * Check for loose connections at VTEC solenoid valve (intermittent fault) * VTEC solenoid valve control circuit is shorted to ground * VTEC solenoid valve is damaged or has failed * PCM has failed (substitute known good PCM and then retest)
DTC P26491T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TVTEC Solenoid Valve Circuit High Input Key on or engine running; and the PCM detected an unexpected high voltage condition on the VTEC solenoid valve circuit in the test. The VTEC solenoid resistance at 68°F is 14-30 ohms. Possible Causes * Check for loose connections at VTEC solenoid valve (intermittent fault) * VTEC solenoid valve control circuit is open * VTEC solenoid valve is damaged or has failed * PCM has failed (substitute known good PCM and then retest)
DTC P2A001T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TAir Fuel Sensor 1 (Bank 1 Sensor 1) Range/Performance Engine started, vehicle driven at over 45 mph for 2-3 minutes followed by a deceleration period of 5 seconds with the throttle closed, and the PCM detected a problem in the AFS1 signal (it was not operating with a range of 0.8-1.2v during the test period). Possible Causes * Check for loose connections at the AFS1 unit (intermittent fault) * AFS1 assembly is contaminated or has failed
DTC P2A021T CCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TAir Fuel Sensor 2 (Bank 2 Sensor 1) Range/Performance Engine started, vehicle driven at over 45 mph for 2-3 minutes followed by a deceleration period of 5 seconds with the throttle closed, and the PCM detected a problem in the AFS2 signal (it was not operating with a range of 0.8-1.2v during the test period). Possible Causes * Check for loose connections at the AFS1 unit (intermittent fault) * AFS2 assembly is contaminated or has failed

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Fig.
OBD II Trouble Code List (U0xxx Codes)
DTC U00731T PCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TFCAN Malfunction (BUS Off) DTC U0122 and U0155 not set; and a message from a learned ID number was not detected for the five seconds from the Vehicle Navigation Module (VTM) or the VSA control module. Possible Causes * Check for loose connections at the VSA control unit (intermittent fault) * Communication is open, shorted to ground or to B+ * VSA has failed (substitute known good VSA and then retest)
DTC U01071T PCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TLost Communication With TAC Module DTC U0122 and U0155 not set; and the PCM detected a problem in the FCAN communication circuit to the Vehicle Navigation Module (VTM) or the VSA control module. Possible Causes * Check for loose connections at the TAC control unit (intermittent fault) * FCAN communication circuit to the TAC is open, shorted to ground or B+ * Throttle body assembly is damaged or has failed
DTC U01141T PCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TFCAN Malfunction (VTM-4 Control Module To PCM) DTC U0073 not set; and the PCM detected a problem in the FCAN communication circuit to the Vehicle Navigation Module (VTM) or the VSA control module. Possible Causes * Check for loose connections at VTM-4 unit (intermittent fault) * Check for any Body Control Module trouble codes * FCAN communication circuit to the VTM-4 is open, shorted to ground or B+
DTC U01221T PCM, MIL YES2003, 2004, 2005, 2006Models MDX Engines All Transmissions A/T, M/TFCAN Malfunction (VAS To PCM) DTC U0155 not set; and the PCM detected a problem in the FCAN communication circuit to the Fuel Control Module (FCM). Possible Causes * Check for loose connections at the VSA control unit (intermittent fault) * FCAN communication circuit to the VSA is open, shorted to ground or B+ * VSA has failed (substitute known good VSA and then retest)

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Fig.




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