Question about 2002 Chevrolet Impala

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Chack engine light will not go out and keeps on throwing the codes po128 and po172

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  • cmcmannis81 Dec 11, 2009

    Yeah i have had the mass air flow sensor fixed all belts and hoses and had the O2 sensor changed. I just replaced the coolent temperture sensor changed. So i really dont know what it wrong with it.

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An excellent read on DTC P0128 can be found here:

http://www.hotrodlane.cc/New%20LS%20Links%20Page/LS%20trouble%20codes/DTC%20P0128.htm

P0172 is a rich fuel condition in bank 1. Have you had any work done lately? A lot of time a leaking fuel pressure regulator will trip this code.

Posted on Dec 11, 2009

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