What are the common causes of P2755?

A short to voltage on the transmission fluid cooler control wire. High resistance in the transmission fluid cooler control circuit. A failed transmission fluid cooler control solenoid. A failed driver in the transmission control module.

Read transmission fluid cooler control status on a scan tool. Command the transmission fluid cooler control on and off. Test the transmission fluid cooler control circuit for a short to voltage. Measure transmission fluid cooler control solenoid resistance. Replace the transmission fluid cooler control solenoid if the circuit tests good. Clear the code and retest.

P2755

Transmission Fluid Cooler Control Circuit High

System: Transmission (P code)
Lamp: Check Engine Light
Category: Powertrain - Transmission

What it means

P2755 means Transmission Fluid Cooler Control Circuit High.

Check these first

A short to voltage on the transmission fluid cooler control wire
High resistance in the transmission fluid cooler control circuit
A failed transmission fluid cooler control solenoid
A failed driver in the transmission control module

What to do next

Read transmission fluid cooler control status on a scan tool
Command the transmission fluid cooler control on and off
Test the transmission fluid cooler control circuit for a short to voltage
Measure transmission fluid cooler control solenoid resistance
Replace the transmission fluid cooler control solenoid if the circuit tests good
Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.