I have a problem with random stalling, a diagnostic report came back with P0638 Throttle Error. Does anyone know whether this is related to the sensor on the throttle body or the actual "fly-by-wire" solenoid on the throttle pedal? And if you do, what is the next step is curing this problem? I have been told its the one near the EGR, if this is the case can I just replace the KT 00562 sensor or do I need a new throttle body?