So I was driving back from the movies doing about 120-130km/h and the check engine light comes on but the car is running fine. I stop at Mcdonalds to check out wtf is wrong with my EF. I turn the car off, Try to start it and it doesn't start. I decided to turn my killswitch on then off. Then the car started fine. I don't have anything to check to see what codes were thrown.

Am I worrying about nothing? My dad said it could be anything like a small hole in the cat etc.