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OBD II Fault Code

  • OBD II P07AC

    OBD-II Code Transmission may not shift properly is defined as a Transmission Friction Element "F" Performance/Stuck Off

    The Hybrid Control Module monitors the transmission clutch for proper operation. If the Control Module detects the clutch is not activating as commanded, code P07AC will be set. The hybrid control module may also place the vehicle in "limp home", limiting available engine/transmission performance to prevent additional damage.

    Transmission may not shift properly Symptoms

    • Engine may enter limp home mode (reduced performance)
    • Transmission may not shift properly

    Common Problems That Trigger the P07AC Code

    • Internal transmission failure
    • Transmission fluid level is low
    • Transmission valve body solenoid failure

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