Pcm Code E22 - Open Throttle Position Sensor Circuit: Description

Throttle Position (TP) sensor is a 3-wire sensor or potentiometer with 5-volt reference input from PCM to sensor circuit No. 474. Ground is provided on circuit No. 476. TP sensor signal circuit No. 417 varies between ground and 5 volts, based on position of throttle plates. At low throttle angle, TP sensor signal voltage is low. PCM uses TP sensor information to determine idle, WOT and proper air/fuel mixture.