P2753Transmission Fluid Cooler Control Circuit/Open
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P2753 is set when the control module finds no closed circuit to the actuator that regulates transmission fluid cooling, usually an electrically switched coolant valve that opens or shuts the flow of engine coolant through the fluid heat exchanger. With the valve output open, the module cannot steer warm-up or cooling of the gearbox oil. Audi uses the code on the 2023 Q7 and SQ7: diagnostic notice AOS-26-09 of February 2026 supplies a tester hotfix because P275300 was stored without a matching guided test. Under CARB rules such an output must be checked for circuit continuity. Unlike P2754 and P2755 no short is involved, only missing continuity from a broken wire, loose pin or burnt coil. Fluid may run hotter under load or warm up more slowly.
- What you may notice
- Check engine lamp on
- Transmission fluid warms up slowly or runs hot when towing
- Transmission overheat warning in severe cases
- Likely causes
- LikelyOpen coil in the transmission fluid cooling valve
- PossibleLoose or corroded connector at the valve, often after coolant contact
- PossibleBroken control wire between module and valve
- RareFaulty output stage in the control module
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €40 – €350
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.