Hey all, I got a feeling i'll get the 'use search button' posts by some people which is fair enough because i know there are alot of threads on this general subject.. ive read them. Problem is though I had my SSV fitted with a catback 3" system and the check engine lights come on, as they seem to for everybody. After reading a few of these threads i opted to get the car tuned, as the concensus seemed to be that tuning the car will fix the problem. So i dropped into KPM today and had one of there 'flash tunes' done for $490 where the guy garaunteed me that'd would fix the problem... Anyways picked it up, all good, drove bout 10 - 15ks then the 'check engine' light pops up again??? Soo i took it back to em and now they seem to think that one of the sensors may have been damaged with the initial 'smoke' or something from the new exhaust!? So another $150 and there replacing that tomorrow.... THE REASON im on here though is they dont seem too confident, and ive already sunk the $490 into it for nothing, so just wondering if anyone has any ideas or even better experienced and solved the same problem??? Cheers!