Let me just give you the info. First I put on the blitz cat back exhaust. Second I put on the AEM cai. Everything was ok for like 2 weeks. Then I put on the cat-less perrin down pipe. I didn’t want to mess with moving the o2 sensor so I took it to easy street and they put it on for me. I drove it off the lot with everything running good. Everything stayed good for like 2 more weeks. Then one day the CEl just turned on. Acceleration and boost feel fine. I was just wondering if anyone had something like this happen. I don’t know if I should take it to the dealer or to easystreet. Im guessing its just something with the o2 senser but im not expert. What can I do to check other than take it back to the dealer ??? if that’s my last resort are they going to yell at me for moding the car. I don’t think it would be coverd under warranty.

 

could be the o2 sensor for the down pipe, but more than likely its the AEM Cai thats giving the CEL because the intake is making the car run lean