A closure device for closing a through opening on a vehicle is provided. An interior space with a filling or connection opening being accessible via the through opening, wherein the filling or connection opening is configured and provided for consumable filling on the vehicle, and it being possible for the through opening to be closed by way of a cover element which can be adjusted on the vehicle in a manner which is actuated by external force between at least one closure position for closing the through opening and an open position for opening the through opening. A control electronics system for triggering an adjustment of the cover element being provided with at least one first and second sensor device.