P0422

2017-10-10

Description:

  • The fault code P0422 indicates that the catalytic converter in Bank 1 is not working efficiently and has fallen below the required threshold. This may cause an increase in harmful emissions or even failure to pass an emissions test.

Possible Symptoms:

  • Illuminated check engine light

  • Failed emissions test

  • Decreased fuel efficiency

  • Poor engine performance or acceleration

Possible Causes:

  • Damaged or failed catalytic converter

  • Faulty oxygen sensor

  • Exhaust leaks

  • Engine misfires or running rich

  • Failed engine control module (ECM)

Related Parts:

  • Catalytic Converter: A catalytic converter is a device that converts toxic gases and pollutants to less harmful pollutants. Problems lead to harmful emissions out of limit, rotten egg smell from exhaust & reduced speed

Possible Solutions:

  • Replace the catalytic converter

  • Replace or repair the faulty oxygen sensor

  • Repair any leaks in the exhaust system

  • Address any engine misfires or running rich issues

  • Replace the engine control module (ECM) if necessary

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