P0123

Diagnostic Chart:

Schematic:

The Throttle Position (TP) sensor is a potentiometer that is connected to a 5 volt reference source, a ground, and an Input signal at the PCM. When the throttle blade is closed, the sensor input voltage will be low and increase as the throttle is opened. The TP sensor is mounted on the throttle body and connected to the throttle shaft which is controlled by accelerator movement.

DTC PARAMETERS
DTC P0123 will set if:
^ TP sensor voltage is greater than 3.9 volts for 13.75 seconds.
^ Engine is running.
^ MAP is less than 60 kPa.
^ Engine speed is less than 1500 rpm.
^ DTCs P0107 or P0108 not set.

or

^ TP sensor voltage is greater than 4.8 volts for 13.75 seconds.
^ Engine is running.
^ DTCs P0107 or P0108 not set.

DIAGNOSTIC AIDS
Normal voltage readings should vary smoothly from approximately 0.35 volts to over 4.65 volts as the throttle is moved from closed to wide open position.