Question about Cars & Trucks
...P0431 consistently and P0456 rarely. Can one determine if the cc's are working by the exhaust smell? I have had the threshold codes since I b 120K miles No major accident damage Everything is ...
P0431 may mean that one or more of the following has happened: The catalytic converter is no longer functioning properly An oxygen sensor is not reading (functioning) properly There is an exhaust leak
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