Could be that wiring harness too than, mine came on when it was cold.
And yes get it scanned, best thing to do. That way you can work on a specific area instead of just throwing money at it.
No problem thats what we are all here for. Hope its something simple.
1997 SVT Cobra. Mangaflow Off Road X, mils, Ford B Springs, Steeda Tri-ax
1997 GT Rio Red: PI intake, bbk cai, SCT tuner (Brenspeed tune), bbk catted x pipe, flowmaster super 44's, MSD coils, H&R lowering springs, M&M CC plates, tokiko shocks and struts. Sold.