97 audi a4 2.8 fwd
When the car gets warm at idle and when I come to a stop at a light or something idle drops and goes up constant.
The c/e is on for p1101 and p1103 Should My question is would a bad 02 sensor cause this? Or are these codes something else?
Thanks and this site has been very helpful.

 

Did some searching and It can be the cause of my idle so when I pull the codes It says bank1 sensor1 where is this located on the car I know I have a few of these. Also best I've seen for pricing for afc before cat is 95.99$ and place recommended to buy one and thanks.

 

Those are both codes for bank 1, sensor 1, which i *believe* is the driver's side precat sensor. That would also cause the bouncing idle you're talking about

 

Can anyone confirm this I'm about to buy it. It's the drivers side behind the head before cat???