TDI AHU Error G81: What Does It Mean?

Hello.
I have another question about my TDI (Golf III, engine code AHU).
The engine is behaving normally. It started well in the winter and drives as expected.
I had actually inquired about the FSP (Failure Signature Profile) of the MSG (Main System Group) because of a malfunctioning air conditioning system.
It is an intermittent G81 error indicating a short circuit to ground.

The sensor is located in the pump. Can anyone tell me what effect this error has? I'm not even sure how long it's been there. I might have been driving like this for years. Also, the glow plug indicator isn't flashing on the dashboard.
If it's not absolutely necessary, I don't want to mess with it. Never change a running system . Or could it be that the car won't start in the winter?

Thank you for your responses.

Well, if you're already using diagnostic hardware, it would be easy to also read the values from the sensor!

Best regards, Roberto.

hello
Thanks for the tip. Can you also tell me which material code I need to read?
I think that if the sensor is detected as defective, it will automatically switch to a standard replacement value.

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hello Thank you for the tip. Can you also tell me which

MWB I need to read?
MWB 7, first field.

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However, I think that if the sensor is detected as defective, it will automatically switch to a standard replacement value.

Yes, but this value is so low that the temperature-dependent volume adjustment no longer works, resulting in a loss of performance.
Furthermore, with fluctuating values, the injection timing can also become unstable.

Hey.
Thanks for the tips. With the "VP37 seal replacement" instructions, it was easy to replace the sensor.
"Those 18 euros were worth it. The car pulls much better now, I'm almost afraid to give it full throttle again."
Thank you.