P0256 - OBD II Trouble Code

Our automotive experts have put together the following information about the P0256 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 P0256 code.

OBD II Fault Code

  • OBD II P0256

    OBD-II Code Decreased engine performance is defined as a Injection Pump Fuel Metering Control "B" (Cam/Rotor/Injector)

    The Fuel Injection Pump supplies high pressure fuel to the fuel injectors. Output pressure from this pump is controlled by the Fuel Pump Control Actuator. When the engine control module (PCM) detects an incorrect signal from the Fuel Injection Pump Actuator, the PCM sets code P0256.

    Decreased engine performance Symptoms

    • Decreased engine performance
    • Engine may stall

    Common Problems That Trigger the P0256 Code

    • Fuel injection pump actuator failure
    • Fuel injection pump failure
    • Powertrain Control Module (PCM) failure
    • Wiring issue

    Common Repairs Needed for the P0256 Code

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