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Fault Code: P0474 Exhaust Pressure Sensor Intermittent

13/09/2022 0 Comments

Symptoms:

  • The exhaust back pressure regulator will be disabled, in either a closed or open position
  • Reduced engine performance and insufficient turbocharger pressure
  • The check engine warning light with be illuminated

Causes:

  • Damaged electrical wiring and connectors
  • Shorted or open exhaust back pressure sensor harness
  • Faulty PCM, in very rare cases

Possible Solutions:

  • Clearing or replacing a clogged back pressure tube
  • Replacing or cleaning a faulty exhaust back pressure sensor
  • Replacing or repairing a shorted or open exhaust back pressure sensor
  • Manually test individual circuits within the exhaust back pressure system, and replace any faulty components
  • In rare cases, replacing a faulty PCM
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