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OBD II Fault Code

  • OBD II P0594

    OBD-II Code Cruise control will not operate is defined as a Cruise Control Servo Control Circuit/Open

    The cruise control servo is electronically controlled by the engine computer (PCM). This servo controls the vacuum that activates and deactivates the cruise control system. If the Cruise Control Servo does not operate as requested by the PCM, code P0594 will set.

    Cruise control will not operate Symptoms

    • Cruise control will not operate

    Common Problems That Trigger the P0594 Code

    • Cruise control relay failure
    • Cruise control servo failure
    • Wiring issue
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