P0885 Code - TCM Power Relay Control Circuit/Open

Discussion in 'P - Powetrain Codes' started by fault code, Mar 28, 2018.

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  1. fault code

    fault code Administrator Staff Member

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    What does P0885 Mean?

    The poor running symptoms are consistent with a MAP sensor malfunction. In addition, in some cases, a bad MAP sensor will not throw a code. Again, the ELD code likely represents a separate wiring issue. When you see P0885 engine fault code on your engine code reader this description will help you.

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    What are the common causes of P0885 ?
    • Faulty Transmission Control Module (TCM) Power Relay
    • Transmission Control Module (TCM) Power Relay harness is open or shorted
    • Transmission Control Module (TCM) Power Relay circuit poor electrical connection
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    How do you troubleshoot P0885 ?

    With the valve disconnected, the red voltmeter lead should be attached to the IMRC valve power wire and the black voltmeter lead connected to ground. It should be pretty close to battery voltage (12 volts). If not, then this is the circuit that has the problem.

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