[MagicRat]

The first thing is to scan the computer for codes. I think your car has a self-diagnosis feature where you can do this without a scan tool.

Turn the ignition on, but do not start the car. Press the 'off' and 'warmer' buttons on the climate control at the same time. You should see some trouble codes come up on the information screen on the dashboard. Write the codes down and post them back here.