Sure, since we specialize in these F-150's I have many of the popular codes memorized, and thus can complete this simple one for you. Your code is actually "IMP4."
That would be a 1997 Ford F-150 with a 4.6 V8 and 4R70W automatic transmission.
By the way, you can easily see the PCM (computer) without taking anything apart, it's just above the passenger's kick panel and looks like a rectangular-shaped aluminum box, about 1.5" wide by 6" tall by 9 " long, the way it's mounted in the 1997-2003 F-150. There is a black plastic clip that holds the PCM to it's mounting bracket, just pull that clip straight back and it will come right off, revealing another code sticker on the back of the PCM, which, in your case, will read IMP4.