Living 4 hours from the dealer I feel more comfortable having the ScanGauge in the car. I've had the engine light come on three times since I've had the car 4,600 miles ago. With the ScanGauge I was able to view the falut code, clear the code and did not have to spend time or money going to the dealership. You can check the codes on the net or call your dealer with the code. Take care