Circuit Description

Throttle Position (TP) sensor is used by PCM to determine throttle plate angle for various engine management systems. The TP sensor is a potentiometer type sensor with a 5-volt reference circuit, a low reference circuit, and a signal circuit. PCM provides TP sensor with a 5-volt reference circuit and a low reference circuit. Rotation of TP sensor rotor from closed throttle position to Wide Open Throttle (WOT) position provides PCM with a signal voltage from less than one volt to greater than 4 volts through the TP sensor signal circuit.

When the conditions for running this DTC are met, PCM will use the MAP sensor in order to determine if the predicted operating range of the TP sensor is correct. A skewed MAP sensor may cause this DTC to set. The MAP sensor should be tested for proper operation if TP sensor is operating properly and this DTC continues to set.