P04F2

2017-10-10

Description:

  • Catalyst Heater Supply Voltage Bank 1

Possible Symptoms:

  • Check the fuse for the catalyst heater supply voltage and replace if blown.

  • Inspect and repair any damaged or loose wiring connections related to the catalyst heater supply voltage.

  • Test and replace the catalyst heater relay if it is faulty.

  • Check and fix any issues with the catalyst heater control module.

  • If all other solutions fail, replace the catalyst heater itself.

Possible Causes:

  • Faulty catalytic converter

  • Malfunctioning oxygen sensor

  • Defective or damaged wiring connected to the catalyst heater

  • Faulty relay or fuse related to the catalyst heater

  • Problems with the engine control module (ECM) affecting the catalyst heater

Related Parts:

Possible Solutions:

  • Check engine light illuminated

  • Decreased fuel efficiency

  • Engine misfires or stutters

  • Poor acceleration or lack of power

  • Higher emissions levels

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