Yes, you have answered your own question I think!
There are certain settings in the BSI ECU configuration parameters that must not be changed - because
a) they may not be relevant to the Citroen Marque (as Peugeot vehicles may display info and data on different output displays than Citroen and some Peugeots have retractable screens etc., etc.,). If you change some of these values, you can end up with a non-working car.
b) Some settings are not what you think they are from the description. Example in some areas of configuration, the A/C system is set to absent even though you have A/C - that is because of the specific equipment or display area being configured. So if you change a setting there it can have an impact on equipment not working.
So back to the issue -
a) I need your VIN
b) If you can recall what section you were in and what you changed.
c) If you can't remember, then go back into the BSI options and screen print me out each page of configuration parameters as clear as you can and post them here as images. I can look through them and see what you need to change back. I can't just tell you as there are too many lines and I don't have the time - but if you can provide me with this info, I may be able to spot what you need to do.
Those fault codes relate to the multifuinction screen and to the audio system and are either mis-configurations / communication issues.
