Throttle Position Sensor

The Throttle Position (TP) sensor is a rotary potentiometer sensor that provides a signal to the Powertrain Control Module (PCM) that is linearly proportional to throttle plate/shaft position. The TP sensor has 4 operating conditions: closed throttle (idle or deceleration), part throttle (cruise or moderate acceleration), wide open throttle and throttle angle rate. The TP sensor signal affects air/fuel ratio, injector timing, idle speed, EGR flow and ignition timing. On some applications, TP sensor input is used in determining transmission electronic pressure control, shift and torque converter clutch scheduling. The TP sensor is mounted on throttle body.