I am a new owner of a 2002 Audi A4 3.0 Quattro. My check engine light went on, so I took it toa repair center and they found that it needed a new oxygen sensor. So, they replaced it. To make a long story short, after paying for the service, my check engine light was still on. Now it has been in that shop 4 times, it will be 5 times tomorrow. They have rewired everything and even ordered a genuine Audi part instead of the other one that had put in which was brand new. The check engine light is still coming on after being reset over and over. Does anyone have any idea what could be going on?
Any help would be appreciated. Thanks.

 

what is the fault code? What shop is doing this work?

 

I'd have to get back to you on that code because I don't have it with me right now.