So i just bought a 97 a4 quattro with the 2.8 and not 3 days after i had it the CEL came on and i ran the codes for it and found p1106-not sure what it is so if any one has insite let me know. as well as codes p0304 p0305 p0306 and p0300 which is 0304-0306 is cylinders 4,5,and 6 are misfiring so if anyone has any insite as to if its the coil pack or if its possibly something else any help would be greatly appreciated.

 

P1106 O2 Sensor Circuit Bank 2 - Sensor 1 Voltage too Low / Air Leak

Bank 2 and cylinders 4,5 and 6 are the same.

I believe each bank has 1 coil module. Swap them, bank 1 & 2.

See if the problem moves.