I’m a big fan of the show The Big Bang Theory on CBS. On the show there’s a running joke about Penny’s check engine light always on in her car, yet she doesn’t seem too concerned about the issue. (Check out the video snippet of The Big Bang Theory) This light can pop on for thousands of reasons it might be worth to take a trip to the gas station. If the rubber seal on the fuel cap is not sealing due to a loose or cross threads the pressures that the pump supplies with escape and trigger the check engine light. Simply remove your gas cap, top your tank off with gas, then secure the gas cap ensuring you hear two clicks. Although this may resolve the issue, you might want to continue to watch to see if the light appears again. If you continue to have problems, schedule visit with your local mechanic.
Video snippet of The Big Bang Theory