Possible causes – Drive-by-wire control system malfunction– Throttle actuator malfunction– Throttle valve malfunction– PCM malfunction Tech description Dirty or clogged throttle body can triggered the P0638 code. Before replacing any parts try cleaning the throttle body and reset the engine light. Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P0638 VOLVO OBD…
Tag: VOLVO
P0072 VOLVO Ambient Sensor Circuit Low
Possible causes – Faulty ambient air temperature sensor– Ambient air temperature sensor harness is open or shorted– Ambient air temperature sensor circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)
P0079 VOLVO Exhaust Valve Control Solenoid Circuit Low Bank 1
Possible causes – Faulty Exhaust Valve Control Solenoid– Exhaust Valve Control Solenoid Circuit harness is open or shorted– Exhaust Valve Control Solenoid Circuit circuit poor electrical circuit connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)