Skip the auto shop - Our mechanics make house calls

P2753 OBD-II Trouble Code: Transmission Fluid Cooler Circuit Low

check engine light

P2753 code definition

A P2753 trouble code (sometimes registered as P2754) registers a malfunction in the automatic transmission cooler control circuit, picked up by the PCM. Other supporting modules could include:

  • Transmission control module
  • Body control module
  • Antilock brake control module
  • Instrument panel control module
  • Fuel injection control module
  • Turbo control module
  • Antitheft module
  • Cruise control module
  • Traction control module
  • Climate control module
  • Proximity alert module

What a P2753 code means

If an error is registered in the automatic transmission cooler control circuit, a trouble code will be stored and the malfunction indicator lamp (MIL) will illuminate. Some models may require as many as 8 drive cycles with the problem before the MIL will illuminate, while others might activate it after the initial failure.

Symptoms of P2753 code

  • Stiff, erratic shifting or “gear hunting”
  • Stored trouble code
  • MIL illuminated or Check Engine Light

If the code is stored but the MIL has not illuminated, the code may still show up on a code reader as “pending”

Causes of P2753 code

Diagnosis of P2753 code

Many vehicles feature an electronically controlled valve in the automatic transmission cooler lines. This valve helps regulate the flow of fluid to the cooler while operating. The valve helps the transmission fluid rise to normal operating temperature more quickly. It is controlled by the PCM or a similar controller, which relies on inputs from sensors in the controller area network (CAN). CANs are a communications bus that enables a chain of controllers to work with each other without a single host computer.

The CAN comprises an information-sharing pipeline through a complex connection of wiring harnesses and sensors, controlling practically every electrical function on a vehicle. Control modules rely on input data from a number of sensors and pass these signals on to system components and other control sub-modules.

For a correct diagnosis, you will need an OBD-II scanner/code reader and a digital volt/ohmmeter.

  • Start with a visual check of all wiring and connectors, and repair/replace any corroded, shorted, damaged or disconnected wiring, connectors and components. Retest system after repairs. If all wiring and connectors, including fuses, check out in normal working order, hook up the code reader to the diagnostic connector. Record all stored codes and freeze frame data.

  • Clear codes and test drive the vehicle to see if codes return. If not, the condition may be an intermittent that could possibly be left to worsen before a proper diagnosis can be done.

A P2753 code can be very difficult to diagnose and repair, due to the amount of circuitry and network connections involved. An experienced tech with a specialized scanner, such as an Autohex or Tech II, might be able to narrow down the problem more quickly than a tech with a basic code reader and digital volt/ohmmeter. Using a volt/ohmmeter might involve testing hundreds or thousands of circuits individually, and one misplaced probe can wipe out a chain of expensive modules and neutralize the vehicle’s memory, requiring a complete reprogramming.

How to repair a P2753 code

It’s important to use a memory saving device, in case the system experiences a meltdown.

  • Specialized CAN diagnostic scanners can show pin values and control module condition, and can accurately diagnose problems in computers and circuits in real-time, while the vehicle is being operated.

  • Locate all control modules (sometimes as many as 18) and inspect for any loose wires, corrosion of other problems.

  • Check control module ground circuits for continuity with battery ground. Codes like P2753 are often caused by grounding issues. An auxiliary ground cable is recommended. Check for any ground cables, straps or wires left dangling after recent engine or transmission work.

  • Check for any loose or corroded connectors that could increase circuit resistance and cause a code to be stored. A CAN bus system wiring diagram and pin out value chart can be handy – use the digital volt/ohmmeter to check continuity between individual controllers.

Need help with a P2753 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

More related articles

Insurance Requirements for Car Registration in Kentucky
The Kentucky Transportation Cabinet requires that all drivers in Kentucky carry liability automotive insurance, or “financial responsibility” in order to operate a vehicle legally and maintain vehicle...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...


Related questions

Q: My Mitsubishi Lancer 2005 has a limp mode issue - the car does not erase trouble codes permanently (even by debugging or terminal disconnection)

I see the note where you have previously replaced several components on the transmission already. Do you recall the brand and warranty of these components? If the parts you replaced are still under warranty, you may be able to get...

Q: Computer reads an issue with the oxygen sensor on a Subaru Forester 1999 2.0 Turbo. What is the problem?

Your 1999 Subaru Forester has pre and post catalytic converter oxygen sensors. The pre-converter sensor optimizes fuel trim while the post converter sensor monitors the efficiency of the catalytic converter. A failing pre-converter sensor will degrade vehicle MPG performance. Although...

Q: Engine light on. P000B Code

Hello. When this code comes up it is because the computer is not detecting that the camshaft is moving as it should when the variable valve timing system is functioning. This can be caused by a number of things. It...