Car has 107k miles. Engine light came on (solid, not flashing) for the first time ever. Three trip cycles later, light went off. Next time I started the car, light came on. Three trip cycles later, light went off. Next time I started the car, light came on.

I tightened the gas cap. Wishful thinking. Car runs fine. Has not been serviced lately. Anyone experience this, or know what this is ?

 

Try getting the code, some places do it for free, or there are scanners you can buy to get them.