It's possible that the entire instrument cluster has loose connections!
I had one where several contacts were only lightly touched by solder, and therefore eventually reported errors.
It started with the coolant and then progressed to the battery diode.
I then resoldered several connections, and now everything is working again...
Best regards.
Sure, here is the translation of the text from German to English:
'Micha' translates to 'Michael' in English.