You can go to any Autozone and borrow a code reader from them. I think you need to leave a deposit...that's it, but it's free. The outlet I think is under the dash below where the key goes.
You can then determine what the code means by looking it up at
www.renntech.org
you'll need to become a member, but it's fast and free too. If you want your own code reader, you can get that orange one from hong kong for like 60 bucks delivered. I just got one from there, so if I need it, it's there.
Good luck!
J