Intermittent ignition immobolizer problems

my ignition immobilizer would not let me start my 2000 Acura several times during the past week. seems to start fine after a long cool down, or after sitting over night, but after a short trip it acts up, sometimes taking as long as 1 hour of repeated attempts to start. is this something as simple as changing the key fob battery, or is it in the ignition, or is it something in the shifter?? i only have 68k miles.

I don’t really know the answer to your riddler, but if I was having this problem the remote battery would be the first.