P0120

SYMPTOM
P0120 - THROTTLE POSITION SENSOR SIGNAL CIRCUIT

WHEN MONITORED
Whenever the engine is running.

SET CONDITION
This DTC is set if the throttle angle goes out of range or if throttle angle changes abruptly i.e faster than the throttle body motion could occur). The DTC will also set when the Transmission Control System is using calculated throttle angle from the engine or if an Internal Error in the TCM forces the TCM to use 25 degrees of throttle angle.

POSSIBLE CAUSES
- Related engine dtc's present
- Intermittent wiring and connectors
- Sensor ground circuit open
- TPS signal circuit open
- TPS voltage change not smooth
- PCM - Throttle position sensor