Fault Code: P0431 Warm Up Catalyst Efficiency Below Threshold (Bank 2)

09/09/2022 0 Comments

Symptoms:

  • No noticeable issues whilst driving the vehicle.

Causes:

  • Improperly functioning catalytic converter
  • Too much or too little fuel
  • Contamination from engine oil
  • Faulty components
  • Leaks
  • Oxygen sensor malfunction

Possible Solutions:

  • Broken or faulty parts related to the catalytic converter should be fixed or replaced as needed
  • Replace the catalytic converter
  • Give the vehicle a retest following each individual repair in order to pinpoint the cause of the issue
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