The throttle position (TP) sensor is used by the powertrain control module (PCM) to determine
the throttle plate angle for various engine management systems. The TP sensor is a
potentiometer type sensor with 3 circuits.
The PCM provides the TP sensor with a 5-volt reference circuit and a low reference circuit.
Rotation of the TP sensor rotor from the closed throttle position to the wide open throttle (WOT)
position provides the PCM with a signal voltage from less than 1.0 volt to greater than 4.0 volts
through the TP sensor signal circuit. If the PCM detects an excessively low signal voltage, this
diagnostic trouble code (DTC) will set.
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Throttle Position Sensor Description