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Tag: catalytic converter

Diagnostic Trouble Code P0420

P0420 “Catalyst System Efficiency Below Threshold (Bank 1)”   What is code P0420? Code P0420 stands for “Catalyst System Efficiency Below Threshold (Bank 1)”. This diagnostic trouble code can happen for a number of reasons related to the catalytic converter.

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The Simple Guide to Catalytic Converters

The catalytic converter is a part of the emissions system in your vehicle. It’s found close to the engine and is meant to convert potentially harmful environmental pollutants into benign gases when they are released from the exhaust stream. These

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