To read the codes on your vehicle, you will need a code reader or tuner that has a code reading funciton, such as a Superchips. Some vehicles support the key trick, and will display the codes on your odometer, some do not.
The Key Trick:
1. With the engine off, turn the key to "RUN"
2. Turn key to "OFF"
3. Turn key to "RUN"
4. Turn key to "OFF"
5. Turn key to "RUN"
6. Look at the odometer, any codes should display or if no codes display it will read "done."
