Possible causes – Dirty transmission fluid– Low transmission fluid level– Faulty line pressure solenoid valve ‘A’– Line pressure solenoid valve ‘A’ harness is open or shorted– Line pressure solenoid valve ‘A’ circuit poor electrical connection When is the code detected?
Possible causes – Dirty transmission fluid– Low transmission fluid level– Faulty line pressure solenoid valve ‘A’– Line pressure solenoid valve ‘A’ harness is open or shorted– Line pressure solenoid valve ‘A’ circuit poor electrical connection When is the code detected?
Possible causes – Dirty transmission fluid– Low transmission fluid level– Faulty line pressure solenoid valve ‘A’– Line pressure solenoid valve ‘A’ harness is open or shorted– Line pressure solenoid valve ‘A’ circuit poor electrical connection When is the code detected?
Possible causes – Dirty transmission fluid– Low transmission fluid level– Faulty line pressure solenoid valve ‘A’– Line pressure solenoid valve ‘A’ harness is open or shorted– Line pressure solenoid valve ‘A’ circuit poor electrical connection When is the code detected?
Possible causes – Dirty transmission fluid– Low transmission fluid level– Faulty line pressure solenoid valve ‘A’– Line pressure solenoid valve ‘A’ harness is open or shorted– Line pressure solenoid valve ‘A’ circuit poor electrical connection When is the code detected?
Possible causes – Drive-by-wire control system malfunction– Throttle actuator malfunction– Throttle valve malfunction– PCM malfunction Tech notes Dirty or clogged throttle body can triggered the P0638 code. Before replacing any parts try cleaning the throttle body and reset the engine
Possible causes – Drive-by-wire control system malfunction– Throttle actuator malfunction– Throttle valve malfunction– PCM malfunction Tech notes Dirty or clogged throttle body can triggered the P0638 code. Before replacing any parts try cleaning the throttle body and reset the engine
Possible causes – Drive-by-wire control system malfunction– Throttle actuator malfunction– Throttle valve malfunction– PCM malfunction Tech notes Dirty or clogged throttle body can triggered the P0638 code. Before replacing any parts try cleaning the throttle body and reset the engine
Possible causes – Drive-by-wire control system malfunction– Throttle actuator malfunction– Throttle valve malfunction– PCM malfunction Tech notes Dirty or clogged throttle body can triggered the P0638 code. Before replacing any parts try cleaning the throttle body and reset the engine
Possible causes – Drive-by-wire control system malfunction– Throttle actuator malfunction– Throttle valve malfunction– PCM malfunction Tech notes Dirty or clogged throttle body can triggered the P0638 code. Before replacing any parts try cleaning the throttle body and reset the engine
Possible causes – Drive-by-wire control system malfunction– Throttle actuator malfunction– Throttle valve malfunction– PCM malfunction Tech notes Dirty or clogged throttle body can triggered the P0638 code. Before replacing any parts try cleaning the throttle body and reset the engine
Possible causes – Drive-by-wire control system malfunction– Throttle actuator malfunction– Throttle valve malfunction– PCM malfunction Tech notes Dirty or clogged throttle body can triggered the P0638 code. Before replacing any parts try cleaning the throttle body and reset the engine
Possible causes – Drive-by-wire control system malfunction– Throttle actuator malfunction– Throttle valve malfunction– PCM malfunction Tech notes Dirty or clogged throttle body can triggered the P0638 code. Before replacing any parts try cleaning the throttle body and reset the engine
Possible causes – Drive-by-wire control system malfunction– Throttle actuator malfunction– Throttle valve malfunction– PCM malfunction Tech notes Dirty or clogged throttle body can triggered the P0638 code. Before replacing any parts try cleaning the throttle body and reset the engine
Possible causes – Drive-by-wire control system malfunction– Throttle actuator malfunction– Throttle valve malfunction– PCM malfunction Tech notes Dirty or clogged throttle body can triggered the P0638 code. Before replacing any parts try cleaning the throttle body and reset the engine
Possible causes – Drive-by-wire control system malfunction– Throttle actuator malfunction– Throttle valve malfunction– PCM malfunction Tech notes Dirty or clogged throttle body can triggered the P0639 code. Before replacing any parts try cleaning the throttle body and reset the engine
Possible causes – ECM Harness power supply circuit is open or shorted– ECM Programing– Faulty ECM Tech notes Check the ECM fuse, if fuse is OK try erasing the code first and if the code comes back you may have
Possible causes – ECM Harness power supply circuit is open or shorted– ECM Programing– Faulty ECM Tech notes Check the ECM fuse, if fuse is OK try erasing the code first and if the code comes back you may have
Possible causes – ECM Harness power supply circuit is open or shorted– ECM Programing– Faulty ECM Tech notes Check the ECM fuse, if fuse is OK try erasing the code first and if the code comes back you may have
Possible causes – ECM/TCM programming error Symptoms – Engine Light ON (or Service Engine Soon Warning Light)