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P0340 CODE COMES UP,SENSOR REPLACED CODE STILL COMING BACK.IF ENGINE IS REVED ABOVE 1500 DASH LIGHT GOES OUT BUT WHEN ENGINE IDLES DASH LIGHT COMES BACK ON.

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  • rudy715 Nov 20, 2008

    TURNED OUT THE WIRING TO THE SENSOR HAD RUBBED THROUGH ON THE ENGINE CAUSING IT TO SHORT OUT CAUSING PO 340 CODE.WHEN ENGINE WAS REVED UP THE VIBRATION MOVED THE WIRE OFF THE ENGINE AND LIGHT WENT OUT.MAYBE THIS WILL HELP SOMEONE WITH ANOTHER SOLUTION.

  • yadayada
    yadayada May 11, 2010

    Giving expert bobjrdns a THANKS FOR TRYING IS HOLEY INAPPROPRIATE, WE HELP ON OUR OWN FREE TIME, SHOPS CHARGE UP TO $120.00 PER HOUR, HE WAS TRYING TO HELP.

  • yadayada
    yadayada May 11, 2010

    P0340 is a camshaft position sensor code, I assume this is the sensor you are referring to?

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I have 2000 cadillac deville runs really good it has a po340 engine code runs good b when i come to a complete stop the engine idles up and down only at a complete stop what do i need to do

Posted on Oct 28, 2009

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Was any engine work done to the vehicle, a loose ground can cause this problem. The cam sensor wiring harness can also rub through to ground and cause this problem. If you disconnect the cam sensor harness at the module and read the ac volts across the 2 terminals while idling, it should be about 1V Ac. If not replace the sensor.

Posted on Dec 29, 2009

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Po 340 codes, cpm (camshaft positioner mod. ) change distributor cap and rotor-cleared the code and it was ok for a few days, ...

Posted on Oct 22, 2008

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