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Our automotive experts have put together the following information about the P009B diagnostic trouble code. We've provided the common symptoms that occur when this code is set along with the frequent repairs that address the issues related to the P009B code.

OBD II Fault Code

  • OBD II P009B

    OBD-II Code Decreased engine performance is defined as a Fuel Pressure Relief Control Circuit/Open

    The Fuel Pressure Relief valve is designed to release excessive fuel pressure. When the engine control module (PCM) detects an issue with the Fuel Pressure Relief Valve signal, the PCM will set code P009B.

    Decreased engine performance Symptoms

    • Decreased engine performance
    • Engine may stall
    • Increased fuel consumption

    Common Problems That Trigger the P009B Code

    • Fuel pressure regulator failure
    • Powertrain Control Module (PCM) failure
    • Wiring issue

    Common Repairs Needed for the P009B Code

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