Hey guys I just basically need to know what you guys thing the problem is with my srt 6 crossfire that has 66k miles.

I have a check engine light that's pulling a p0505 code. I just added DCAI (not needswings) and a catback exhaust(not need wings ) I was told by the dealer it may need to be tuned because of all the new air coming into the motor. Still unsure and want to know what you guys think!