Tuesday, March 12, 2013

"Chrysler PT Cruiser":Check Engine Code "P0340"

Engine codes trouble code P0340

While accelerating accelerate normally "engine sputter", hesitating picking up speed.

"Auto Repair" mechanic scanned the vehicle with OBD ii tool and retrieve Engine error codes P0340

There is simple procedure to retrieve error codes with out Obd ii software.
I will mention that procedure here:

Follow the procedure mentioned below:

With the doors closed cycle the key from off to on three times ending with it on and watch the digital odometer display. Don't crank the starter, just off to on. The codes start with a P and have four numbers, there may be more than one stored. Write down and go through the manual for the error codes.

Here we will discuss about OBD code P0340

P0340  "obd codes" sets when the engine controller doesn't see a signal from the camshaft position sensor.

"Where is the camshaft position sensor"  "What is camshaft position sensor"

The cam sensor is on the left end of the cylinder head and is mounted with two 8mm bolts.
Cam sensor is the sensing device which reads off a magnet on the end of the intake cam and reports the cam's position and speed.

Cam sensor shown as CMP
cam sensor

camshaft position sensor code can be set by improper cam timing, wiring, the magnet in rare cases, or a failure of the sensor itself. At least 99% of the time this is just a failed cam sensor, which is common on these engines.

I  recommend taking a look at the "camshaft position sensor" connection and wiring in the immediate area, if all looks ok then replace the sensor. It's not hard to replace yourself if you normally do some minor repairs. You just have to unplug it and remove the two bolts.

Its suggested only using a Mopar replacement sensor. Aftermarket sensors have shown extremely poor quality and you usually end up with at least the same problem if not more problems with the new sensor. They sometimes cause the same code to immediately reset, new codes to appear, or even a no start condition.

The reason it takes alot of cranking to start it is because the cam signal gets missing. The software in the vehicles NGC engine controller actually allows the engine to start if it sees the cam signal is missing, but it starts with an extended crank time.

The hesitation felt is also because of the missing cam signal. When it sees the signal is missing it will impose a 2,500 RPM rev limiter. When you are accelerating and try to exceed 2,500 RPM it will cut fuel and spark back to limit engine RPM.

camshaft position sensor replacement
The camshaft sensor cost about $61 from a dealer or you can pick one up from an online Mopar parts source such as www.moparonlineparts.com for a bit cheaper. That site sells the same Mopar sensor for $45.

To removal and install new cam sensor:

Chrysler cam sensor

This will help.

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