P0938 Code - Hydraulic Oil Temperature Sensor Range/Performance

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 P0938 Mean?

    The Transmission Control Module (TCM) monitors the Hydraulic Oil Temperature Sensor. The TCM sets the OBDII code when the Hydraulic Oil Temperature Sensor is not to factory specifications.

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    What are the common causes of P0938 ?
    • The Mass Airflow sensor is a hot wire that senses the volume of air entering the intake manifold. The computer uses this information to control fuel mixture.
    • Defective ECU strategies or components will prevent proper regeneration
    • Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.

    How do you troubleshoot P0938 ?

    While fuel economy was increased, acceleration was seriously compromised, and the loss of engine vacuum led to a dangerous loss of braking assist when the P0938 code system was in four-cylinder mode. In addition to these issues, while the company proposed a hydraulically controlled system that could be switched from within the car, the version they implemented had to be manually changed in the engine compartment using hand tools.

    Searches related to P0938 Code - Hydraulic Oil Temperature Sensor Range/Performance
    • P0938
    • P0939

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