Ford P0638 OBD-II Trouble Code Definition: P0638 Throttle Actuator Control Range/Performance P0638 Ford OBD-II Trouble CodeDescription: OBD Trouble Code P0638 Throttle Actuator Control Range/Performance What does the code mean? OBD-ii Code P0638 definition: The Powertrain Control Module (PCM) compares the actual Throttle Possition (TP) with the target TP when the engine is running. If the difference […]