check engine light???

Your CAI shouldn't have anything to do with a CEL. Unless the
MAF was deffective to begin with. We don't know enough about your car to really give an indication, but just have the codes pulled at Advance if you don't have a code reader, they'll do it for free. A code reader is cheap, and always good to have around though.
 
Wise advice above. There's no need to guess at what the CEL is for - just pull codes and see.

Good luck.