In order to control the operating temperature of the transmission, some vehicles utilize a control valve system that can route ATF to a transmission cooler if the ECU detects a rise in operating temperature. A P2755 DTC means there is likely electrical issue transmission cooler control system.
How Serious is the Code?
A P2755 diagnostic trouble code indicates the potential for serious internal damage to your transmission. If the temperatures rise, the clutches and seals can be irreversibly damaged.
Symptoms of a P2755 include:
- Erratic up/down shifts
- Harsh shifts
- Overheated transmission
- Damaged wiring/connectors
- Blown transmission cooler fuse
- Faulty transmission cooler control valve
- Faulty transmission cooler valve position sensor
- Faulty automatic transmission cooler
How to Diagnose the Code?
One of the first steps to diagnosing a P2755 OBD2 trouble code, is to check the fuses, wiring and connectors. Depending on the vehicle, it may be possible to test the transmission cooler control valve. However specialized diagnostic computers may be needed to determine if the cause of the problem is a software or sensor issue.
What Repairs Will Fix P2755?
- Repair damaged wiring
- Repair damaged connectors
- Replace fuse
- Repair/replace transmission cooler control valve
- Replace transmission cooler valve position sensor
- Repair/replace transmission cooler
- Reprogram ECU/TCM
- P2753 – Trans Fluid Cooler Ctrl Circ/Open OBD-II Trouble Code
- P2754 – Trans Fluid Cooler Ctrl Circ Low OBD-II Trouble Code