P2754 indicates that the transmission fluid cooler control circuit is reporting a voltage lower than expected, meaning the control module cannot properly command the cooler valve or solenoid. This typically points to an open or short to ground in the wiring, a faulty cooler control solenoid, or a problem with the transmission control module's output driver.
A break, chafed wire, or corroded connector prevents the control voltage from reaching the cooler solenoid, causing a low‑circuit reading.
An internal open coil or mechanical binding in the solenoid results in insufficient current draw, which the module interprets as a low circuit.
An inaccurate temperature signal can cause the module to command the cooler incorrectly, leading to a low‑voltage condition on the control circuit.
A high‑resistance ground path reduces the voltage seen by the module, triggering the low‑circuit code.
A failed driver transistor inside the TCM can no longer supply the required voltage, but this is uncommon.
An internal processor or driver failure in the engine control module could cause the code, though it is extremely rare for P2754.
No. The PCM/ECM is rarely the root cause; most often the issue is wiring, connectors, or the cooler control solenoid.
Yes. An out‑of‑range temperature signal can cause the control module to command the cooler incorrectly, resulting in a low‑circuit code.
Not always. If the wiring or ground is faulty, the code will return after solenoid replacement.
No. Module replacement should only be considered after all wiring, connector, and component tests have been exhausted.