P0638 OBD Code Definition:
P0638 Throttle Actuator Control Range/Performance
P0638 OBD Code Description:

OBD Code P0638

Throttle Actuator Control Range/Performance

What’s mean?

OBD2 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 is more than the specification, the PCM determines that there is a throttle actuator control circuit range/performance problem.


Possible sumptoms of P0638
– Engine Light ON (or Service Engine Soon Warning Light)

Possible Causes

Possible causes of P0638
– Drive-by-wire control system malfunction – Throttle actuator malfunction – Throttle valve malfunction – PCM malfunction

Possible Solutions

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