VW CAM position sensor

Tiny
GAZHO
  • MEMBER
  • 2001 VOLKSWAGEN PASSAT
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 107,000 MILES
I have an '01 VW Passat v6 2.8. The engine light is on because of the cam position sensor. The car starts and runs fine. The timing belt was changed about 7 months ago. Is it possible that the sensor itself is sending a bad or no signal?
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Sunday, December 12th, 2010 AT 11:02 PM

4 Replies

Tiny
RASMATAZ
  • MEMBER
Camshaft Position Sensor Circuit Malfunction

A 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
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Sunday, December 12th, 2010 AT 11:08 PM
Tiny
GAZHO
  • MEMBER
The actual code is PO348-camshaft position sensor a circuit high bank 1.
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Tuesday, December 14th, 2010 AT 3:10 AM
Tiny
MHPAUTOS
  • EXPERT
Check for a high resistance in the sensor wire back to the ECU, look for a loose pin or corroded pin in the plug.

Mark (mhpautos)
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Thursday, December 16th, 2010 AT 10:14 AM
Tiny
MAS TEC 1970
  • MEMBER
Yes it could be the CMP (CaMshaft Position) sensor but, it is also possible the timing belt was not installed correctly, if the camshaft timing is off it will set code: P0348 (VAG# 16732)

Test:
1. Access the Camshaft Position (CMP) Sensor G163 located on the back of Bank 2 cylinder head. (Between the cylinder head and bulkhead.)

A. Pin 1 Red/Black (RO/SW) is a 5 V power source.

B. Pin 3 Black (SW) is the sensor ground.

C. Pin 2 Yellow/Black (GE/SW) is the signal wire. 11 V should be present coming from the Engine Control Module (ECM) to the sensor. While the engine is cranked over (or running) there should be a clean cut square wave patter that drops from 11 V all the way to ground.

NOTE:
Use of the Cam Bar, a (special tool) is required to verify timing belt timing. Once the timing belt has been verified, removal of the valve covers to verify timing chain timing would be required. All timing marks (belt and chain) must line up together.
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Sunday, August 17th, 2014 AT 7:09 PM

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