Cam Position Sensor and Intermittent Tach
07-25-2007, 12:12 PM
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Cam Position Sensor and Intermittent Tach My Bone Stock 6sp 2002 Formula with 15k miles:
My Tach comes and goes (needle will drop to zero and then come back to life) and every now and then I get P0341 and a P0342 (Cam position sensor low voltage) SES codes. The codes come and go and usually clear themselves out eventually (some times after only a few ignition cycles, sometimes after many ignition cycles).
About the same time this started happening, I noticed that the car had the typical Delco battery acid leak/battery cable corrosion. Other than the tach/CPS SES I've had no other electrical problems and the car starts at the turn of the key and runs great otherwise.
I cleaned up the positive cable lead (baking soda bath followed by a wire brush) but noticed some distress on the end of the cable- the gold coating on the cable had corroded away and there was some pitting in the base metal. I put a little vaseline the cable after cleaning it up and installed a new red top Optima.
I'm still having the tach problem and getting the same SES codes since installing the new battery.
Anybody think the two issues are related? (cable corrosion and tach/CPS problem?) Should I replace the battery cable before pulling the intake manifold to check on the CPS and CPS connectors? If not and the problem is actually in the CPS circuit, is there an easy way to differentiate between a bad connector and a bad sensor? Should I open up the PCM and check the connections there first? Are there any other connectors between the CPS and the PCM that I should check?
Thanks
My Tach comes and goes (needle will drop to zero and then come back to life) and every now and then I get P0341 and a P0342 (Cam position sensor low voltage) SES codes. The codes come and go and usually clear themselves out eventually (some times after only a few ignition cycles, sometimes after many ignition cycles).
About the same time this started happening, I noticed that the car had the typical Delco battery acid leak/battery cable corrosion. Other than the tach/CPS SES I've had no other electrical problems and the car starts at the turn of the key and runs great otherwise.
I cleaned up the positive cable lead (baking soda bath followed by a wire brush) but noticed some distress on the end of the cable- the gold coating on the cable had corroded away and there was some pitting in the base metal. I put a little vaseline the cable after cleaning it up and installed a new red top Optima.
I'm still having the tach problem and getting the same SES codes since installing the new battery.
Anybody think the two issues are related? (cable corrosion and tach/CPS problem?) Should I replace the battery cable before pulling the intake manifold to check on the CPS and CPS connectors? If not and the problem is actually in the CPS circuit, is there an easy way to differentiate between a bad connector and a bad sensor? Should I open up the PCM and check the connections there first? Are there any other connectors between the CPS and the PCM that I should check?
Thanks
