So I've only had my Titan since the end of September and only have 700 miles on it. about 150 miles ago I put a JBA catback on it and just yesterday a Service Engine soon light lit up. Checking the manual it says a solid light means an emision problem. The gas cap is on tight and I crawled under her today and checked the connections and everything is tight. So I'm wondering if the exhaust is causing it or something else? Do you think if I take it to the dealer they will give me crap and not even deal with it at all for having an aftermarket exhaust? Any opinions would be great...thanks in advance!