wow that sux. after all that trouble you went through and that was the problem lol. scan your car again though. you should fix that abs sensor next if your car is running fine though. you said you changed the ECT but you're still getting a code for it. did you not clear the codes after you installed it? i'd erase any existing codes, scan it, then drive it for 60 miles and scan it again. the codes for your air temp and stuff are for your interior air so worry about that after you've got the engine and abs fixed first

 

Ok sounds good, after all codes are taken care of i'll take it to Audi and have them look it over to see if they see anything else it needs. I bought this model because i love the body style and through the posts I was told the 2.8 were a little more reliable and less to diagnose when something happened. And I need a good AWD car and didn't want to go Subaru...LOL