You can check your codes with a paperclip. You have to bend the paper clips so the ends of it are together, pointing the same way. Then find your OBD port under the driver's side dash and stick one end of the paper clip into pin a and the other into pin b. If you are looking at the plug it is the two on the right, on the row closer towards the seats. Stick the clip in there, turn your ignition to run 2, do not start it. The SES light should turn on and off, then will blink codes. They will be 2 digit codes, and it starts off with a 12 code, which is by default then it will read off all other trouble codes.