good catch man. yeah advance or autozone will do it for freeIf you're talking about the little green / yellow / red indicator at the bottom of the cluster, you can just use your key, push in the button, and it resets to green. It's just a friendly reminder to do maintenance every (I think) 7000 miles.
If you actually have a Check Engine Light (CEL), then do like projekt said and get a code reader and check what code(s) you are throwing. I hear you can get it done free at Advanced Auto Parts.
x2its just a reminder for oil change...
jesus