audi a4 b6 2004 1.6 petrol, the radiator fan turns on when the engine is cold

Hello.
My problem is that the fan starts a few seconds after the ignition is switched on (engine cold and off)
comp shows "engine cooling thermostat F 265 circuit P1292"
I clear the error and the windmill stops, I start the engine and after a few seconds the windmill starts (same error) puts out the car, the windmill stops, gives ignition and starts again ...
Someone told me that it's a Klima pressure sensor but I don't have the way to check it and I don't want to buy and exchange everything in turn ...
One more question, should the belt tensioner have any vibration? if it has to be replaced or something is tightened wrongly ...
I am asking for help and thank you in advance

You can check the air pressure sensor in the parameters ... But you have another error ...

muzyk68 wrote:

"engine cooling thermostat F 265 circuit P1292"

Well, what kind of help do you mean, you have a clear error, check it or replace it ....

autoas wrote:

muzyk68 wrote:

"engine cooling thermostat F 265 circuit P1292"

Well, what kind of help do you mean, you have a clear error, check it or replace it ....

If I knew what to check or replace, I wouldn't ask ... I have no idea what sensor it is and where it is ...

Then let someone who knows, e.g. service, earn.

Sensor in thermostat housing.
The engine controller does not see the signal from the sensor, so it turns on the fan preventively so that the engine does not overheat.
You need to check the sensor resistance, maybe it's broken or maybe it's the fault of the damaged wire between the sensor and the ECU.
The sensor goes down and the other wire goes to the ECU.