Transmission code, P1745

Tiny
GARY SCHRAG
  • MEMBER
  • 2012 DODGE CARAVAN
  • 3.6L
  • 6 CYL
  • 2WD
  • 96,000 MILES
Got a p1745 code in my van and it is in limp mode. It will not shift or go above forty. It says line pressure with an open loop. Just wanted some ideas on what might be the problem.
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Wednesday, June 6th, 2018 AT 4:12 PM

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Tiny
ASEMASTER6371
  • EXPERT
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?

Roy

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.

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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".

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Repair

- Perform the appropriate diagnostics.

Sensor and switch

REMOVAL

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

ImageZoom/Print

2. Remove the clamp plate bolts and clamp plate.

ImageZoom/Print

3. Remove the electrical connectors to the pressure control solenoid and line pressure sensors.
4. Remove the solenoid/pressure switch assembly.
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Wednesday, June 6th, 2018 AT 9:26 PM

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