I was talking with someone and it dawned on me that by having bad vacuum lines I may have caused my O2 sensor to blow out. That might explain why the codes came back after replacing it initially. Now that the vacuum lines are replaced it might make sense to replace the O2 sensor a second time.

 

How...? Unless you were misfiring, this is extremely unlikely.

 

Hello,

I did not know where to post it so I decided to write it here.

Friend of mine has Audi a4 1.8 t quattro, 125 kw 170 km, AWM
Year of manufacture: 2000

Error code: 17536 - BANK1 MULTIPLICATIVE MIXTURE ADAPTATION

I guess it refers to turbo or it is something going on with these vacuum hose ? I am not a machinist but he says that probably one of the "conductors? lines?" which goes to turbo is blowing the whole thing up.
But there so many of them that none of the machinists want to deal with that.
Sorry for my bad English, any ideas?