Q: I have a 2005 vw jetta 2.5. Trying to find location of Coolant Temperature Sensor?

asked by on

2005 vw jetta 2.5. Radiator fan runs when car is off and kills battery. Looking for Coolant Temperature Sensor and unable to locate it. Can you help?

My car has 129000 miles.
My car has an automatic transmission.

As you face the front of the car, the coolant temperature sensor is on the right side of the top of the engine. You will see a clip that holds the sensor to the engine mounting surface. Look for a plastic top on the sensor (gray or black) and a two-wire terminal wiring harness plugged into the plastic top. The sensor is merely one component in the radiator fan circuit and may not account for the misoperation of the fan. There is also a relay and that relay could simply be stuck closed and/or the circuit commanding the relay could be always powered on due to a short circuit. In any event, all components should be tested prior to condemning them, both to save money and speed the diagnostic. If you desire that a mechanic resolve this, simply request an electrical component diagnostic. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. I have a 2005 vw jetta 2.5. Trying to find location of Coolant Temperature Sensor?

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: My ac compressor quit working in my 2016 vw jetta what could be the main cause for this being brand new?

VW has seen a lot of problems with these compressors and has issued a service bulletin on some of their 2015 and 2016 cars. There is a defective regulating valve that causes compressor failure. In many cases they are performing...

Q: My car is leaking light brownish half dollar size kind of right under the glove compartment is for almost 2 weeks

Hello. There are a few common causes for a light brown leak. You did not mention whether the leak was under the car or inside, so I will provide an answer to both. If the leak is outside...

Q: On the radiator cap there is light brown pudding/paste deposit.

Hello Daniel, thank you for writing in. While these issues are frustrating, it may be as simple as needing to flush the system. Yes when you flush the entire system, you should be able to flush the water pockets as...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...