Is the car still running the same? If so, make sure you tightened the fuel cap after getting gas. If it is loose, it will set an EVAP code in the computer turning the light on.
If it is tight, take the car to a nationally recognized parts store and have them scan the computer. Most will do it for free, so there will be no money out of pocket for you.
Let me know what you find.
Thursday, November 2nd, 2017 AT 9:12 PM