Rick's Free Auto Repair Advice

Posts Tagged: cataytic converter

Diagnose a catalytic converter

How to diagnose a catalytic converter to make sure it’s dead A p0420 or P0430 trouble code usually is an indication of a bad catalytic converter. But do you know for sure that the catalytic converter is dead? Catalytic converter do fail. But sometimes things are happening upstream that can cause a P0420 or P0430 and they don’t necessarily mean the catalytic converter is bad. This post deals with how to check out those upstream possiblities as well as checking the actual condition of the catalytic converter. This is one … Read More


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