2002 Buick Regal po0171 code

2002 BUICK REGAL
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GENEIMLER
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Engine Performance problem
2002 Buick Regal 6 cyl Front Wheel Drive Automatic

replaced cat and now i get this code. replaced o2 sensor on back side of manifold still get the code. i had replaced the mass air sensor last month from a different problem. no vacuum leaks found.
Sep 17, 2010 at 8:33 AM
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WRENCHTECH
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  • ASE Certified Mechanic
That is a lean code that means there is too much unmetered air getting into the engine. This could be a vacuum leak or a problem with the MAF sensor.
Sep 17, 2010 at 9:12 AM
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