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2001 Pontiac Aztek Question: what would cause codes p0171 and code 404 on my pontiac aztek

 

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vince2321, 3.4L V6, Crystal Lake, IL, September 07, 2012, 13:52
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after changing the acm sensor,gas cap, and purge valve,also changed the plugs and wires

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  • Answer #1

    csubak30 September 07, 2012, 14:39
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     Master

    Code p0171 is usually caused by a vacuum leak somewhere on bank 1. Check gaskets, seals, and especially vacuum hoses for damage to cause this problem.

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