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Our automotive experts have put together the following information about the P2509 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 P2509 code.

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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