Throttle Position Sensor

Throttle Position (TP) sensor is a rotary potentiometer sensor that provides a signal to PCM that is linearly proportional to throttle plate/shaft position. TP sensor housing has a 3-blade electrical connector that may be gold plated. The gold plating increases corrosion resistance on terminals and increases connector durability. TP sensor is mounted on throttle body and has 4 operating conditions: closed throttle (idle or deceleration), part throttle (cruise or moderate acceleration), wide open throttle (includes maximum acceleration or de-choke on crank), and throttle angle rate. TP sensor signal affects air/fuel ratio, injector timing, idle speed, EGR flow and ignition timing.