my 2001 pontiac grand prix has service engine soon message. message on reader is P0171-left bank. cleaned MAF and replaced MAP. reset code several times. car runs great! any other suggestions?
85

Asked by bearball Oct 21, 2014 at 01:44 AM about the 2001 Pontiac Grand Prix GT

Question type: Maintenance & Repair

also replaced upper plenum, new plugs and wires as well as intake manifold and gaskets.

1 Answer
24,965

Mark answered 9 years ago

This is one of the tougher codes to track down because it is very general. It could be a number of things.http://www.obd-codes.com/p0171

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