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17545/P1137/004407 - Fuel Trim: Bank 1 (Add): System too Rich

Possible Symptoms

  • Malfunction Indicator Light (MIL) active

Possible Causes

  • Mass Air Flow (MAF) Sensor faulty
  • Fuel Pressure Regulator faulty
  • Fuel Injector(s) faulty
  • Oxygen Sensor Control faulty
    • Oxygen Sensor(s) faulty
  • Evaporative Emission (EVAP) System faulty

Possible Solutions

  • Check Mass Air Flow (MAF) Sensor
  • Check Fuel Pressure Regulator
  • Check Fuel Injector(s)
  • Check Oxygen Sensor Control
    • Check Oxygen Sensor(s)
  • Check Evaporative Emission (EVAP) System

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