2002 Audi A4 3.0 Quattro scan code PO431
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1st Gear
Joined: Sep 2011
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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?
1st Gear
Joined: Sep 2010
Posts: 409
From: Boston MA
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