I have a 14 VT. I bought it a few months ago with 73k and a CEL. The salesman put the code reader on it and said it was because of the K/N CAI. I had thought nothing of the CEL until around november i would notice the engine would do a weird stutter when getting on the interstate. I figured one of the crank/cam sensors went bad and if not that maybe a belt issue? Any suggestions?