camshaft positioning sensor

Hey JONATHAN,

Got you covered buddy, here you go. Please let us know how the repair goes so it can help others. Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.

My check engine light went on. I took it to the dealer and was told I needed a camshaft position sensor and serpentine belt. They also replaced a side marker bulb and performed a brake fluid flush. $1125 later the engine light comes back on when I drive it home after picking up the car from the dealer. I take it back the next day and they say there are cam correlation faults in the system and suspect timing chains are stretched causing the failure, to the tune of $3700! Had they found this the first time around, I would have never spent the $1125. Does all this sound right?

What size engine? camshaft position sensors can be changed without moving a timing belt. the serpentine belt is also straight forward to replace. What exactly was done for $1125?

Take it back... if the codes are different than before, then something was not done right.

Thomas

about two months ago my car just stopped working. when i ran the code it came up code P0340 which is 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. i wanna know before buying the part if its actually gonna fix it or if it could be something minor.

Nobody is going to know that until the circuit has been troubleshooted to find the problem. All the code does is tell the technician where to look. There are other possibilities other than the ones you mentioned also.It can also be a mechanical issue with the engine and not electrical at all.

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?

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 actual code is PO348-camshaft position sensor a circuit high bank 1.

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)

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.