Question about 2003 Chevrolet TrailBlazer

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Code PO171 and PO172

I have trouble code PO171 and PO172 on my '03 Chevy Trailblaser what can be cause this problem?

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  • BCANALE1 Jul 19, 2008

    2000 1500 CODE PO 171, PO174, PO420, CATALYST SYSTEM EFFICIENCY BELOW THRESHOLD

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1 Answer

Http://www.obd-codes.com/p0171

Check this website out. Hope it helps!

Posted on Jul 15, 2008

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