What is the reason for the failure of automobile electronic throttle?

Electronic throttle fault is caused by poor contact, open circuit or short circuit of throttle position sensor. The following are the specific causes and diagnosis methods of the fault: electronic throttle fault cause: the throttle position sensor is damaged. The throttle position sensor has poor wire contact, open circuit or short circuit, incorrect initialization position, too much carbon deposition on the throttle, and the throttle servo motor is damaged. Poor contact and short circuit of throttle servo motor line. Engine control unit is faulty. Diagnostic method of electronic throttle fault: read freeze-frame data with computer diagnostic instrument. When DTC (Fault Code) is stored, ECM (Engine Control Module) records vehicle and driving condition information as freeze frame data. When troubleshooting, the stop frame data is helpful to judge whether the vehicle is running or stopping, whether the engine is warm or cold, and whether the air-fuel ratio is lean or rich.