Doce1seven

I just bought an 2000 maxima (used). I have a couple questions if anyone can help.
first..since i bought it the ses light has been on, however, whenever the battery get disconnected it will through a completely different code.
Currently its p0110.
Has anyone else had this problem?
And Where is the intake air temperature sensor?
I've seen diagrams that aren't really clear. A real life view would help greatly!!!!