Throttle Position Sensor: Description and Operation

The Throttle Position sensor (TP sensor) is a rotary potentiometer in which the powertrain control module determines four operating modes from the TP signal. These are:
- closed throttle (idle or deceleration).
- part throttle (cruise, moderate acceleration).
- Wide Open Throttle (WOT) (maximum acceleration, de-choke on crank, and A/C cutout).
- throttle angle rate.