ive been popping a p2096 code for the past month or so, mods are kn drop in,injen charge pipes, qtp cutout and catless dp , thought maybe the cutout being opened may have set the cel off , but any ways closed it for a few days and went and got tuned last weekend, it wouldn't make anymore power past 5000rpm, other wise it would get like 5*of kr , running on vpower 91 due to no ethanol,is it possible that a bad o2 sensor could cause kr? the tuner did say he was having an issue with the o2 while tuning. car only made 275hp and 344tq @22psi

 

Bump

 

I'm gonna point a finger towards the tuner. For you catless dp do you have the defouler for the o2 sensor?

 

Its a really reputable tuner here in ontario, I'm sure its not his tune , no I don't have the defouler, would I need a defouler on the primary o2 sensor?