bigalpha Posted October 20, 2010 Share Posted October 20, 2010 If the 02 sensor is bad it can cause the engine to run rich. Well, can this cause a high idle issue too? Link to comment Share on other sites More sharing options...
Pete M Posted October 21, 2010 Share Posted October 21, 2010 probably not. high idles are usually indicative of a vacuum leak, a bad IAC or a bad TPS. Link to comment Share on other sites More sharing options...
esporer Posted October 24, 2010 Share Posted October 24, 2010 No sir, o2 sensors only change the mix. A failed o2 won't cause any change in idle speed. Link to comment Share on other sites More sharing options...
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