P04F5

2017-10-10

Description:

  • Catalyst Heater Circuit Low Bank 2

Possible Symptoms:

  • Check the wiring and connections to ensure they are secure and properly connected.

  • Inspect the oxygen sensors for any damage or contamination and replace them if necessary.

  • Clean or replace the catalytic converter if it is clogged or not functioning properly.

  • Check the fuel injectors for any blockage or malfunction and clean or replace them as needed.

Possible Causes:

  • Faulty oxygen sensor

  • Malfunctioning catalytic converter

  • Defective catalytic converter temperature sensor

  • Loose or damaged wiring or connectors in the catalyst heater circuit

  • Engine control module (ECM) failure

Related Parts:

Possible Solutions:

  • Check engine light illuminates

  • Decreased engine performance or power

  • Poor fuel efficiency

  • Rough idling or engine stalling

  • Failed vehicle emissions test

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