Yes, there are tons of things that can cause the light to come on.

You need to have the code checked with a scanner. AutoZone has a basic scanner that they will hook up to your truck free of charge. The dealer has a more advanced diagnostic scanner that they hook up and pinpoint the problem.

I'd first start at AutoZOne and see if its something simple.

88 4R, 350 V8, R150 5 speed Sold <...uot; />
97 4R, stock, daily driver
98 Sienna, kid and dog hauler, wife's ride