I replaced the camshaft position sensor on a Hummer 3 2006 (5 cylinder) after the code P0340 came up and it has problems with starting. Sometimes it starts right away and sometimes it will not. So I'm trying to figure out what to do next...maybe replace the crankshaft position sensor?
Does anyone have any recommendations?

 

Hard starting or no start Rough running / misfiring Loss of engine power Causes 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 Solutions With 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

 

I replaced the intake camshaft postion sensor, called on star, p0340 no longer comes up, but now, p0366 comes up. i guess i replace the sensor in the rear of engine.... check wires etc...