Possible causes

– Low transmission fluid level
– Dirty transmission fluid
– Faulty Low Reverse solenoid valve
– Low Reverse solenoid valve harness is open or shorted
– Low Reverse solenoid valve circuit poor electrical connection

Tech notes

There is a factory service bulletin for the following Jeep models:

2003-2005 Jeep Wrangler
2003-2005 Jeep Liberty
2003-2005 Jeep Cherokee
Jeep Factory Service Bulletin OBDII Code P0750

When is the code detected?

The P0750 code is detected when TCM detects three consecutive solenoid continuity test failures, or one failure if test is run in response to a gear ratio or pressure switch error

Symptoms

– Engine Light ON (or Service Engine Soon Warning Light)
– Transmission will not shift gears.

P0750 JEEP Description

The Low Reverse (LR) is monitored at initially power-up, then every 10 seconds thereafter. The solenoids will also be tested immediately after a gear ratio or pressure switch error is detected.

JEEP Technical Service Bulletins for P0750 code