2002 Audi A4 3.0 Quattro scan code PO431
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09-16-2011 | 11:53 AM
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2002 Audi A4 3.0 Quattro scan code PO431
This code says it is bank 2 catalyst warmup efficiency. First off which side of the car is this, drivers or passengers? Secondly does this mean I need to replace the catalytic converter or is there a chance the O2 sensors are bad?
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