P04F6

2017-10-10

Description:

  • Catalyst Heater Circuit High Bank 1

Possible Symptoms:

  • Inspect and replace the oxygen sensor in Bank 1

  • Check and repair any wiring issues or damage in the catalyst heater circuit

  • Clean or replace the catalytic converter in Bank 1

  • Verify and repair any issues with the engine control module (ECM) related to the catalyst heater circuit

  • Replace the catalytic converter in Bank 1

Possible Causes:

  • Faulty oxygen sensor

  • Malfunctioning catalytic converter

  • Engine misfire

  • Vacuum leak

  • Faulty fuel injector

Related Parts:

Possible Solutions:

  • Check engine light on

  • Decreased fuel efficiency

  • Rough or irregular engine idle

  • Difficulty starting the engine

  • Reduced engine performance

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