Q: High and fluctuating idle. Tried some re-learn programs with no success.

asked by on October 24, 2016

High and fluctuating idle Tried. Some learn codes but did not work.

My car has 140000 miles.
My car has an automatic transmission.

Hi - the problem you describe could be a leak in the air intake system (loose hose or fitting), or a problem with the idle air control valve. Are any problem codes set (Check Engine Light on)? If so, these would be instructive in solving this problem. The "idle re-learn" process, essential when replacing throttle position sensors, will not be effective (as you note) when there is an air leak that is "uncontrolled".

I would recommend having an inspection to determine why the idle speed is high completed by a mobile, professional mechanic, such as one from YourMechanic, to diagnose the problem.

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