P0625 Code - Generator Field Terminal Circuit Low

Discussion in 'P - Powetrain Codes' started by fault code, Jan 29, 2018.

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  1. fault code

    fault code Administrator Staff Member

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    What Does P0625 Mean?

    The powertrain control module (PCM) monitors generator load from the generator/regulator in the form of frequency. The concern indicates the input is lower than the load should be in normal operation. The load input could be low when no generator output exists.

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    What are the common causes of P0625 ?

    Unlike most other PCM codes, the most likely cause of this code being stored is a defective generator or generator control module. Many generator control circuits are integrated into the PCM. Other causes may include corroded, open, or shorted wiring or connectors in the CAN Bus harness, a loose control module ground strap or broken ground wire, the CAN bus may also be defective.

    How do you troubleshoot P0625 ?

    The exact steps your mechanic takes will depend on the specifics of the codes that were stored. However, they will most likely:
    • Replace any damaged electrical components (this includes blown fuses)
    • Replacing the control module ground strap
    • Disconnecting all of the CAN’s pins to test them (this takes a long time and can be very expensive so should therefore be the last step)


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