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2002 chevy cavalier camshaft sensor. my reader says PO340 . circuit malfunction. where is it? how do i change it?

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  • Cars & Trucks Master
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It appears to be located down by oil filter, three wire connector. Take wire connector loose, the sensor should have a mounting bolt, remove the bolt, work the sensor out. I can't guarantee replcing will fix the problem, if not, could be a problem with wiring circuit, some where?
2002 chevy cavalier camshaft sensor. my reader say - camshaft-dsdsvwebwh5zl0cg0nqfsxny-5-0.jpg

Posted on May 19, 2017

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  • Cars & Trucks Master
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Which engine ? could have come with three different ones !
Engine Controls - 2.2L (L61)
Engine Controls - 2.2L (LN2)
Engine Controls - 2.4L ???????????????
Doesn't have a cam sensor anyway !
DTC P0340
Circuit Description
This ignition system does not use a conventional camshaft position (CMP) sensor that detects valve train position. The ignition controls module (ICM) detects when #1 or #3 cylinder has fired on its compression stroke using sensing circuitry integrated within each coil. The sensing circuit detects the polarity and the strength of the secondary voltage output, the higher output is always at the event cylinder. The ICM sends a CMP signal to the powertrain control module (PCM) based on the voltage difference between the event and waste cylinder firing energy. This system is called compression sense ignition. By monitoring the CMP and crankshaft position (CKP) signals, the PCM can accurately time the operation of the fuel injectors. If the PCM receives an intermittent CMP signal from the ICM, the CMP Resync Counter on the scan tool will increment. When the PCM cannot use the information from the CMP signal, a DTC will set. DTC P0341 sets when the PCM detects too many CMP Resyncs within a certain amount of time.
Any other codes ?
Could be the ignition control module , PCM , crank sensor .
Your best bet , have a qualified repair shop check it !
Pin F at the ignition control module is the cam position signal to the PCM , a brown with white stripe wire , pin 26 connector 2 at the PCM , check for a open circuit .

Posted on May 19, 2017

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Posted on Jan 02, 2017

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Code PO340 was read for my 2002 dodge neon ?


code p0340 refers to camshaft position sensor(CMP) sensor A bank 1--circuit malfunction===causes--wiring--CMP sensor--ECM . Check the wiring to the sensor, check the air gap for the sensor , replace the sensor.

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Code PO340 bad camshaft sensor. I replaced the sensor and i the car still wont start. I still get the same code and the car will not start.


Trevor: Alittle known fact is that most Chrysler cars do not need a full OBD code reader! By performing the "Key-Dance" you can show the codes on the odometer without any reader! Look for info on how to read the codes with the ignition key.

On your problem, you need to check the wiring and connectors, and also check the proper cams and belt timing, as it is difficult but sometimes an out of timing (one tooth only) misalignment can make the car not to start.
Amclaussen.

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Check engine light po340 car skips over 60mph


The camshaft position sensor circuit is malfunctioning. This could be due to a wiring short in the circuit or the PCM and the camshaft position sensor may have failed.

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2003 Hyundai Santa Fe Still Will Not Start PO320 PO340


code p 0320 refers to crank shaft position sensor (CKP)/engine speed (RPM ) sensor---circuit malfunction====causes ---wiring---CKP/RPM sensor ---ECM
code p 0340 refers to camshaft position sensor (CMP) sensor A bank 1---circuit malfunction===causes wiring---CMP sensor ---ECM
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Got code po340 on 2008 Chrysler PT cruiser. Runs great sometimes when engine light on & rough at other times like not getting gas. Engine light does not come on every day either. Cam sensor or timing...


P0340: Camshaft Position Sensor A - Bank 1 Circuit Malfunction

- Camshaft Position Sensor harness is open or shorted
- Camshaft Position Sensor circuit poor electrical connection
- Faulty Camshaft Position Sensor
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2 Answers

Can u tell me what the problem of this code PO340


I have a 1999 BMW 740 il My SES light came on so I hooked up my OBD code reader p0340 - Camshaft Position Sensor Circuit Malfunction is what came up. so I went to the BMW parts department and bought the Camshaft Position Sensor.
I Replaced the with the new. My SES light was still on so I hooked up the OBD reader again hoping it may reset my SES light but it didn't what did happen is the OBD reader came up with the same code (p0340 - Camshaft Position Sensor Circuit Malfunction) witch is what I just replaced. now I'm at a loss. I'm not sure how to reset my SES light and if I just replaced the Camshaft Position Sensor why dose it the OBD code p0340 still come up. Any suggestions?

Mar 18, 2011 | 1996 Nissan Altima

1 Answer

Code po340 says camshaft position sensor circuit malfunction


replace the cam shaft positioning sensor. this is not a big job
the sensor is usually on front of block above the crankshaft pulley wheel
to change involves disconecting wire from sensor. remove bolt remove sensor,intall new sensor, replace bolt.re connect wire

Dec 14, 2010 | Dodge Caravan Cars & Trucks

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Error code po340 for a 2002 hyundai elantra


Here is what I could find on your P0340 error code:
CausesA code P0340 could mean one or more of the following has happened:
  • a wire or connector in the circuit could be grounded/shorted/broken
  • the camshaft position sensor may have failed
  • the PCM may have failed
  • there exists an open circuit
  • the crankshaft position sensor may have failed
Possible SolutionsWith a P0340 OBD-II trouble code, diagnosis can be tricky at times. Here are some things to try:
  • Visually inspect all the wiring and connectors in the circuit
  • Check for continuity in the circuit wiring
  • Check the operation (voltage) of the camshaft position sensor
  • Replace the camshaft position sensor as required
  • Check the crankshaft position circuit as well
  • Replace circuit wiring and/or connectors as required
  • Diagnose/replace the PCM as required
Sounds like since you have replaced both the camshaft and crank shaft sensors you need to look at the PCM.  Go down the line of possible solutions and don't replace the PCM unless nothing else works obviously.  I hope this helps but it looks like you are looking at getting a new PCM.  Good luck.  Thanks for rating my response and for using FixYa!

May 27, 2009 | Hyundai Motor 2002 Elantra

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