P0973 Code - Shift Solenoid 'A' Control Circuit Low

Discussion in 'P - Powetrain Codes' started by fault code, Mar 31, 2018.

  1. fault code

    fault code Administrator Staff Member

    May 11, 2017
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    What does P0973 Mean?

    The Engine Control Module (ECM) commands gear shifts by turning the shift solenoid valves ON/OFF . When there is an open or short circuit in any shift solenoid valve circuit, the ECM detects the problem and illuminates the engine light and stores the Diagnostic Trouble Code (DTC). And the ECM performs the fail-safe function and turns the other shift solenoids valves in good condition ON/OFF .

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    What are the common causes of P0973 ?
    • A large air leak at or near the number one oxygen sensor would also cause a lean mixture.
    • Faulty IMRC actuator relay (if equipped)
    • Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.

    How do you troubleshoot P0973 ?

    Possible repairs for the P0973 trouble code are:
    • Replacement of the shift solenoid valve A
    • Replacement of the wires, connectors, circuits, or harness
    • Addition or replacement of transmission fluid
    • In rare cases, replacement of the PCM, TCM, or ECM

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