OBD II Fault Code

  • OBD II P018F

    OBD-II Code Decreased engine performance is defined as a Fuel System Over Pressure Relief Valve Frequent Activation

    The fuel system has a Fuel Pressure relief valve to vent excessive Fuel Pressure. If the engine control module (PCM) sees too high of a pressure, it will vent the system. When the PCM is constantly relieving pressure, the PCM will set code P018F.

    Decreased engine performance Symptoms

    • Decreased engine performance

    Common Problems That Trigger the P018F Code

    • Blockage in the fuel system
    • Fuel pressure sensor failure
    • Powertrain Control Module (PCM) failure
    • Wiring issue

    Common Repairs Needed for the P018F Code

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