Rick's Free Auto Repair Advice

Posts Tagged: cataytic converter

Diagnose a catalytic converter P0420, P0430

How to diagnose a catalytic converter P0420, P0430 the proper way How catalytic converters fail Overheating, melting, or a broken substrate can cause a P0420 or P0430 Overheating is caused by feed gases from the engine that exceed normal limits. Excessive fuel or oil in the exhaust can cause the catalytic converter to overheat and melt. Or, the overheating can cause the matting inside the catalytic converter shell to deteriorate, allowing the substrate to bang around and break. Catalytic converter poisoning can cause a P0420 or P0430 Excessive oil in … Read More


Custom Wordpress Website created by Wizzy Wig Web Design, Minneapolis MN