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OBD II Fault Code

  • OBD II P084D

    OBD-II Code Transmission may not shift properly is defined as a Transmission Fluid Pressure Sensor/Switch "H" Circuit High

    The Transmission Fluid Pressure Switch allows the engine's control module (PCM) or Transmission Control Module (TCM) to use hydraulic fluid to engage the clutches in the transmission to allow for smoother shifting while driving. If the PCM or TCM detects an issue with the hydraulic clutch or the pressure switch, the PCM or TCM will set code P084D.

    Transmission may not shift properly Symptoms

    • Increased fuel consumption
    • Transmission may not shift properly

    Common Problems That Trigger the P084D Code

    • Transmission Control Module (TCM) failure
    • Transmission fluid level is low
    • Transmission fluid pressure sensor failure
    • Wiring issue
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