[Slant]

Just reset the ECU, and give it some time. If it still comes on then you have a problem, but it probably won't.

 

[Slant]

Hmmm...if you don't see anything wrong with the CAI, and it did come on after 3 months, and it won't go away. Maybe you should put back your stock air box to make sure it's not something else that's causing the CEL.