P0122

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 P0122 will set if TP sensor voltage is less than 0.1 volts for 6.25 seconds and engine is running.

DIAGNOSTIC AIDS
Check the tightness of the female terminal grip with a spare male terminal.

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.

IMPORTANT: The Powertrain Control Module (PCM) uses a single internal 5.0 volt power supply power to all the engine control components. If one component shorts its 5.0 volt reference circuit to ground or battery voltage, the other 5.0 volt reference circuits will also have a low or high voltage.