I am sorry if im abusing the forum lol
but thanks for everyones help

Can you guys show me where the 2 o2 censors are , i was trying to buy one and it says 2 are required ( im guessing one for each converter) i found one should the other one be at the same place just on the other side??? or somewhere else

thankyou

 

Hold On I just bumped a long thead about them to the top. They are located on the downpies. Basically if you could rip out the frame where your feet/passangers feet would be they are there. Its a PITA!

 

I have a similar problem with my 2000 A6 2.7t. CEL light is on, it's code p1176 -> O2S Correction Behind Catalyst, B1 Limit Attained. I cleared it twice with my obd2 and it came back within 50 miles each time. No other codes.
If I understand this right, I need 02 sensor(s) after cat? One or two sensors?

thanks!