Parking heater 2007 S80 2,5T

[nhseidler]

Hello

I have a problem with the parking heater on my 2007 S80 2,5T

It will not fire up when setting it to "Direct Parking Heat ON"

Reading the fault code on the Vida tells me: CPM U-300049- Internal failure or electronics.
Clearing the code with Vida does not help. It comes up again after I start the car.

The funny thing is that when I run diagnostics and testing in Vida on the CPM-module.....all is fine. I can get the heater to work when starting it from Vida.

To me it seems like there must be some sort of communication-problem between the CPM-module and maybe the ECM.
Anyone experienced the same........or any ideas.

Best regards
Niels