No, on the older efi systems, the temp sender will not throw a code.
I bet it is something related to your charging system, because the blower fan operates off of a 50 Amp fuse, so it's expected to have a huge draw. Possibly the blower fan motor is getting old and it's taking so many amps that the alternator can't keep up or something?
It might also be related to your A/C system, but I doubt the older ecu's would notice that either...
Jump your diag box (T1 to E1) and see what the code is.
