Close

What Does P0638 Code Mean?

    OBD-II Code P0638 is defined as a Throttle Actuator Control Range/Performance

    The engine computer (PCM) monitor the movement of the throttle body to verify that it matches its commanded position. If the throttle body fails to move as requested, code P0638 will be set.

    P0638 Symptoms

    • Decreased engine performance

    Common Problems That Trigger the P0638 Code

    • Powertrain Control Module (PCM) failure
    • Throttle body assembly failure
    • Wiring issue
    Not the OBD-II Code You're Looking For?

    No comments yet...

    Sign in to comment