Calibrated consumption goes up to unreasonable levels

I have been using ABRP for years and this is my fourth car, an Opel Frontera. Connected to a Bluetooth dongle it has worked flawlessly with the 3 first cars, 2 ID.3s and a BYD Atto 3. But selecting the Frontera in the app gave me no soc data from the car and I found some YouTube video

https://youtu.be/gxmn03WjM-U?si=V0iWqILFFBG1Ipxo

showing the “correct” pid settings. Everything seems to work except the calibration of the consumption, it just goes up and up, see attached pic.

If anyone has got a working setup I’d be greatful if you could share it