Same problem discovered on my A4 Audi 2016 Tfsi 2.0, last friday the same two errors came up for the first time. Parked the car and after looking at this forum ordered the part on Saturday, arrived today £78, the comments and photos from Simon and the other guys were very helpful and proved a god sent.
Changed the part in minutes, all errors have disappeared and brakes feel good as before.
Thanks to all of you who have posted, Giuseppe