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  • P0604 ECM Software Error

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    Mopar1973Man

    P0604 ECM SOFTWARE ERROR

    When Monitored and Set Condition:

    When Monitored: While the key is on.
    Set Condition: Internal ECM software error.

    POSSIBLE CAUSES

    • REFLASH ECM
    • ECM

    DIAGNOSTIC PROCEDURE

    1. Using the DRBIII®, reflash the module with latest calibration Was the flash successful?
      Yes --> Go To 2
      No --> Replace the ECM.
    2. Run the engine for one minute and shut off. With the DRBIII®, read DTCs. Did P0604 set?
      Yes --> Replace the ECM.
      No --> Test Complete.

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