P1791

Conditions for Setting the DTC
- The Transmission Control Module (TCM) detects a malfunction of the Throttle Position (TP) sensor signal as the following for 4 seconds; - 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
- TCM will request the illumination of MIL and store DTC when TCM detects a failure on the first ignition cycle.
- 4th gear is held in "D" range.
- 1st gear is held in "L" range.
- No TCC lockup control.
- Full line pressure.

Conditions for Clearing the MIL/Power Lamp/DTC
- The TCM turns off the MIL when no further failures detected for three consecutive ignition cycles.
- The Scan-100 scan tool can clear the DTC from the TCM history.
- The TCM clears the DTC from the TCM history memory after forty consecutive ignition cycles, without fault while it detects that the TP sensor duty ratio is between 2.0% and 98.0% for 4 seconds continuously.