I am having an issue with a code being triggered in my car and it causing the check engine light to come on. I know my catalytic converter isd good since it is a brand new Magnaflow high flow preformance cat from zzp. The guys at Advanced auto are telling me i may have an exhaust leak? Anyone experinced this and know for sure? Or am I having a problem because of the high flow cat? Any Help would be appreciated thanks guys!!!!