X3 on the Checker, Autozone, etc. It's free, and you can do it yourself or have them read it for you. Clear the code and see if it comes back right away (depending on what the code is). Then, post up the code and someone can tell you what the likely cause is.
Horribly Painted '95 FZJ80 Has Some - Still Needs More!
"If you like California so much, please move there. Don't make the rest of us live in the same HORROR!!!"