May be a newb question but how do i keep my CEL from coming on when i decide to put full exhaust on my 225 TT ie: 42 Draft, high flow cat, etc. I recently had a vw GTI with full 2.5 on it and the CEL was on all the time until i decide that i was sick of the light and pulled the codes and what the codes where pretty much saying is the co2 sensor was reading incorrectly, so i threw the old factory cat back in and it went away so are there any suggestions on what i should do.

The GTI had APR software and CAI on it if that will help

 

You shouldnt of had any problems if you were using a cat. If you do, for any reason you can get a test pipe file from your sw provider or get some o2 spacers.

 

What software should i go with. in other words who provides that. i am assuming that is what you are talking about

 

I beleive all of them do Revo, APR, GIAC.

 

O2 spacers, can you elaborate for those that dont know...??

 

Some info

 

Do you know if this is a hard process pretty much do i need an expert or can i attmpt it myself

 

All you need is a wrench and some penetrating lube.

 

Do you guys think I will likely pull a CEL if I install the APR turbo back exhaust? It's got a high-flow cat. I've sent APR email but while I wait for their response I thought I'd post here too.

 

you shouldnt.