P0638 SUZUKI - Throttle Actuator Control Range/Performance
Drive-by-wire control system malfunction
Throttle actuator malfunction
Throttle valve malfunction
Dirty or clogged throttle body can triggered the P0638 code. Before replacing any parts try cleaning the throttle body and reset the engine light.
Engine Light ON (or Service Engine Soon Warning Light)
P0638 Suzuki 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.