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Aug 02, 2012 | 2001 Pontiac Aztek
It is a rich condition for both a and b banks, you need to look at things that feed both. That code is most often MAFS, but you need monitor fuel pressure. Even more important is your long term fuel trim may be still under old operating conditions. Disconnect the negative battery cable and momentarily touch it to the positive cable to provide a path to ground for the capacitors and erases volatile memory in the ecu's. Then you won't be dealing with past parameters the ecu.s use for performance changes...A fuel pressure reg. is a likely culprit too
Undo your negative battery terminal for 30 minutes then re connect it. This should clear any fault codes. the exception is if there is still a problem then it won't work.
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