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Old 02-02-2013, 04:09 PM   #5
thom4782
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Join Date: Sep 2010
Location: Foster City CA
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The problem could be caused by several things. Given that your seeing rich and lean faults on both sides of the engine, my best guess is that your MAF (mass air flow) sensor is either dirty or failing. Inconsistent MAF signals could cause the fuel mixture to be too rich or too lean sometimes. Seach for how to clean the MAF, give it a try, clear the codes and see if they come back.
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