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Our automotive experts have put together the following information about the P251D 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 P251D code.

OBD II Fault Code

  • OBD II P251D

    OBD-II Code Wiring issue is defined as a PTO Engine Shutdown Circuit/Open

    The PTO allows Auxiliary equipment such as a dump bed or plow to be hydraulically operated using the vehicle's transmission. The PTO will shut off the engine if the load on the PTO becomes too great. This is done to prevent damage to the engine and/or transmission. If the PTO Engine Shutdown switch sends an implausible signal, code P251D will be stored. PTO operated features will not work.

    Wiring issue Symptoms

    • PTO system disabled

    Common Problems That Trigger the P251D Code

    • PTO engine shutdown switch failure
    • Wiring issue
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