My a6 2.7t 6spd is putting out a bunch of codes.
1) 17866 EGT sensor 2
2) 17869 Bank 1 sensor EGT
3) 16891 Idle Speed Control
4) 17539 Bank 2 sensor 1 o2
5) 16684 Random misfire
6) 16688 cylinder number 4 misfire
7) 16689 Cylinder number 5 misfire
8) 16690 Cylinder number 6 misfire

My car has been under warrenty and i have brought it there 3 times and they think they fix it but it does nothing. It is now 1000 mils over the warrenty. They have put in a new ignition module and supposedly an EGT sensor #2. The past times the Bank 1 sensor EGT and Bank 2 sensor 1 o2 and idle speed control were not in the codes and now they re. It seems almost the car is getting worse when i bring it there. Does anyone know if there maybe one thing causing this to trick all of these codes to come out or what? Im confused on where to even start.. Anyone know anything about any of this?