P0638 MITSUBISHI - Throttle Actuator Control Range/Performance
- Drive-by-wire control system malfunction
- Throttle actuator malfunction
- Throttle valve malfunction
- PCM malfunction
- Engine Light ON (or Service Engine Soon Warning Light)
P0638 Mitsubishi Description
The Powertrain Control Module (PCM) compares the actual Throttle Possition (TP) with the target TP when the engine is running. If the difference is more than the specification, the PCM determines that there is a throttle actuator control circuit range/performance problem.