Last night the Check Engine light came on while I was driving. There was about a quarter tank of gas in the car. I filled it up and tightened the gas cap well. Told my wife about the gas cap and she said she didn't know to click it several times. I'm hoping that is the problem.
The light has remained on for several On/Off cycles of the van. Google searches tell me it will clear after so many cycles but I see different answers about that. Tomorrow I will take it to Advance Auto and get a free OBD II scan done to find out what it is.
What should I expect to discover and how should the light be reset to see if it returns again?