OBD-II code · Powertrain (generic, extended)
P2755 Transmission Fluid Cooler Control Circuit High
Voltage on the transmission fluid cooler control line is above the expected window. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
Is it safe to drive with P2755?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyControl wire shorted to B+
- PossibleOpen solenoid coil
- Less likelyConnector pins corroded - high contact resistance
Symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.8–2.5 h
- Emissions test
- Usually unaffected
- Parts involved
- Trans Fluid Cooler Valve, Wiring Harness
Related codes
- P2752Intermediate Shaft Speed Sensor C Circuit Intermittent
- P2753Transmission Fluid Cooler Control Circuit / Open
- P2754Transmission Fluid Cooler Control Circuit Low
- P2756Torque Converter Clutch Pressure Control Solenoid
- P2757Torque Converter Clutch Pressure Control Solenoid Control Circuit Performance/Stuck Off
- P2758Torque Converter Clutch Pressure Control Solenoid Control Circuit Stuck On
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.