What Does P2509 Code Mean?

    OBD-II Code P2509 is defined as a ECM/PCM Power Input Signal Intermittent

    The engine computer (PCM) relies on a constant power supply from the Battery. If the PCM does not have sufficient power supply, code P2509 will be set.

    P2509 Symptoms

    • Engine may not start
    • Engine may stall

    Common Problems That Trigger the P2509 Code

    • Powertrain Control Module (PCM) failure
    • Powertrain Control Module (PCM) power relay failure
    • Wiring issue

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