P0878 Code - Transmission Fluid Pressure Sensor/Switch 'D' Circuit High

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

  1. fault code

    fault code Administrator Staff Member

    May 11, 2017
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    What does P0878 Mean?

    The P0878 code means that the PCM has detected an abnormal pressure reading from the transmission fluid pressure sensor or switch. The pressure detected can be either too high or low when compared to manufacturer specifications.

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    What are the common causes of P0878 ?
    • Faulty Transmission Fluid Pressure Sensor/Switch 'D'
    • Transmission Fluid Pressure Sensor/Switch 'D' harness is open or shorted
    • Transmission Fluid Pressure Sensor/Switch 'D' circuit poor electrical connection

    How do you troubleshoot P0878 ?

    Look at the plug wires to make sure they are not burnt or laying on the exhaust. 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. Look for rubbing, scraping, bare wires, worn spots or melted plastic connectors. Pull the connectors apart and carefully look at the terminals (the metal parts) inside the connectors.

    Searches related to P0878 Code - Transmission Fluid Pressure Sensor/Switch 'D' Circuit High
    • P0878
    • P0879

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