P04F7

2017-10-10

Description:

  • Catalyst Heater Circuit High Bank 2

Possible Symptoms:

  • Check the wiring and connectors for any damage or loose connections.

  • Inspect the catalytic converter for any signs of damage or clogging.

  • Test the oxygen sensors for proper functioning and replace if necessary.

  • Check the engine control module (ECM) for any faults and reset if needed.

  • Verify the fuel mixture and adjust if it is running too lean or rich.

Possible Causes:

  • Faulty oxygen sensor

  • Malfunctioning catalytic converter

  • Loose or damaged wiring in the catalyst heater circuit

  • Faulty powertrain control module (PCM)

  • Exhaust system leak

Related Parts:

Possible Solutions:

  • Malfunction indicator lamp (MIL) illumination

  • Decreased engine performance

  • Poor fuel efficiency

  • Rough idle or engine misfires

  • Engine overheating

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