- Low transmission fluid level
- Dirty transmission fluid
- Faulty 2/4 solenoid valve
- 2/4 solenoid valve harness is open or shorted
- 2/4 solenoid valve circuit poor electrical connection

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 P0755

The P0755 code is detected when TCM has detected a fault in the 2/4 Solenoid circuit

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

The 2/4 Solenoid 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.

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