P1791

DTC P1791 - THROTTLE POSITION (TP) SENSOR CIRCUIT MALFUNCTION
Conditions for Setting the DTC
- The Transmission Control Module (TCM) detects a malfunction of the Throttle Position (TP) sensor signal.
- No TP sensor signal.
- TP sensor duty ratio is less than 2.0%.
- TP sensor duty ratio is more than 98.0%.
- Engine speed is greater than 400 rpm.

Action Taken When the DTC Sets
- The TCM illuminates the Malfunction Indicator Lamp (MIL) after a trip with a failure reported.
- 4th gear is held in "D" range.
- 4th gear is held in "3" range.
- 1st gear is held in "L" range.
- No Torque Converter Clutch (TCC) lockup control.
- Full line pressure.

Conditions for Clearing the MIL/DTC
- The TCM turns off the MIL after a trip without a failure reported.
- The Scan-100 scan tool can clear the Diagnostic Trouble Code (DTC) from the TCM history.
- The TCM clears the DTC from the TCM history if it detects that the TP sensor duty ratio is between 2.0% and 98.0% for 4 seconds continuously.








DTC P1791 - Throttle Position (TP) Sensor Circuit Malfunction