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OBD II Fault Code

  • OBD II P00B9

    OBD-II Code Decreased engine performance is defined as a Low Pressure Fuel System Pressure - Too Low, Low Ambient

    The engine control module (PCM) uses pressure sensors to determine the pressure in the fuel system. If the pressure drops too low, the PCM will set code P00B.

    Decreased engine performance Symptoms

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

    Common Problems That Trigger the P00B9 Code

    • Clogged fuel filter
    • Fuel pressure regulator failure
    • Fuel pump failure
    • Leaking fuel lines
    • Powertrain Control Module (PCM) failure
    • Wiring issue

    Common Repairs Needed for the P00B9 Code

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