DTC P1683: Throttle Valve Default Position Spring Performance Problem: General Description

The electronic throttle control system controls the throttle valve opening. The system includes the throttle actuator, the throttle valve, throttle position (TP) sensors A and B, the electronic throttle control system (ETCS) control relay, the accelerator pedal position (APP) sensor, and the powertrain control module (PCM). The throttle valve default position spring is attached to the throttle valve gear. It opens the throttle valve to improve starting performance in cold conditions, or to retain minimum running performance in case of electronic throttle control system failure. If the throttle valve does not return to the default position when the throttle actuator moves to the default position from the fully closed position, the PCM detects a throttle valve default position spring malfunction and stores a DTC.