well i kinda dont mind cause checking through a vagcom every month is kinda good incase something does popup so you can fix it quick. And theres an easy fix for getting rid of the cel. But im a lazy *** and dont care.

 

You can simply take the code away with a VAG-Com, correct?

 

but it will keep comin back

 

How often?

 

Yes it WILL give you a cel. UNLESS you modify the 2nd o2 sensor with two modified sparkplug foulers. Heres the write up. It worked on my car.

http://forums.vwvortex.com/zerothread?id=1366095&page=1

 

Daily, weekly, whenever the ecu senses the the airflow is greater then it should be. The only use for the secondary o2 sensor is to tell the ecu if the CAT is still alive and is flowing correctly. Here is some info on the spark plug non fouler test pipe

 

I have it with the neuspeed exhaust, and it sounds awesome. With Revo there is no cel.

 

I am happy that I don't have secondry O2 sensor ,no CEL either ...

 

Yes the CEL comes on. Took ~50 miles for me.

 

yes you just have a neuspeed exhaust but they are talking about a test pipe which does not come with the neuspeed system you should never get a cel from doing a cat back

just get a HFC and you won't have to worry about CEL's that is what I did