Transmission code, P1745

Good morning.

Description below. The line pressure is too high. Diagnostics below as well. You will need an advanced scan tool to monitor the system for the tests. No common issue. Every one is different and needs to be checked. It is possible the pressure switch or sensor is the issue. The valve body in the transmission needs to be removed to access these items. Will you be attempting this repair yourself? Diagrams below

Theory of Operation

This DTC is an informational DTC to inform the technician that transmission has been operating in an open-loop line pressure control for 3220 kilometers (2000 miles) or 1000 2-3 upshifts resulting from a Line Pressure DTC. The 62TE Transmission is not designed to operate in open-loop line pressure control for an extended period time. This DTC is intended to protect the transmission. If the DTC sets, the transmission controller will place the transmission into limp-in mode.

- When Monitored:
Continuously with ignition on.

- Set Condition:
If the transmission has been operating in an open-loop line pressure control for 3220 kilometers (2000 miles) or 1000 2-3 upshifts.

Always perform the 62TE Pre-Diagnostic Troubleshooting procedure before proceeding. See: Computers and Control Systems > Initial Inspection and Diagnostic Overview > Pre-Diagnostic Troubleshooting Procedure
CHECK FOR RELATED DTCS
1. With the scan tool, check for Transmission Line Pressure DTCs.

NOTE: In order to erase this DTC you must reset (erase) the VLP Shift Counter and the Output tooth counter which is a single procedure under Miscellaneous functions in the scan tool called "Clear Variable Line Pressure (VLP) counters".

View repair

Repair

- Perform the appropriate diagnostics.

Sensor and switch

REMOVAL

1. Remove valve body See: Valve Body, A/T > Removal and Replacement > Valve Body - Removal.

2. Remove the clamp plate bolts and clamp plate.

3. Remove the electrical connectors to the pressure control solenoid and line pressure sensors.
4. Remove the solenoid/pressure switch assembly.

Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.