Question--
My car is a 1999 Saturn SL1. The readout was:
"Trouble code OBDII (ALPHA) P code
TROUBLESHOOTING P0507
The PCM has determeined that the engine RPM is higher
than expected for the current enging operating conditions."
thank you......mitch
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Followup To
Question -
My check engine light came on and I had the code read at Auto Zone. The results: rpms too high for current conditions.....no one seems to have seen this one before...and advice? thank you...mitch
Answer -
Mitch,
If you are speaking of a high idle code I can help. I do need some more information on your vehicle. Make, model, year, code number if you can get it. That would help out alot.
Chris
AnswerMitch,
Here are a few possible corrections for your condition:
1. Dirty throttle body bore- causes IAC valve to stick and/or throttle body to stick open.
With the engine off, inspect throttle body bore to make sure carbon has not built up around the butterfly. If needed, take a small amount of carb/choke cleaner on a rag and wipe out the inside to the throttle body. DO NOT LET ANYTHING FALL INTO THE INTAKE!
2. Bad IAC valve (Idle Air Control) There is a test that you can run for an IAC valve, but you must have the scantool that the dealership uses. TRY THIS INSTEAD:
Remove the pos and neg battery cables from the battery. Remove both of the battery cable bolts from the cables. Remove the red and black covers that cover the end of the leads. Touch the red cable to the black cable (WITHOUT TOUCHING THE BATTERY) for 10 - 20 seconds. This will discharge all electricity from the memory of your PCM (engine computer) and reset the IAC sensor. It sounds complicated, just follow instructions word for word. If that procedure doesn't work you will probably have to take it in.
3. Check for vacuum leak. Listen for a "hissing" noise with the engine running. Carefully put your fingers under the black hose that runs from the intake manifold to the cam cover, this is the PCV hose. If you find a leak, just replace the hose. Also, spray some of that carb/choke cleaner on the engine, where the intake manifold and cylinder head meet. If the engine boggs down, you know that you have a leak at the intake manifold gasket.
Be careful, hope this helps,
Chris
