Ford Focus 2010 Instrument Cluster Guide - Check Fuel Cap indicator

The main function of the Check Fuel Cap indicator is to warn the user whether the fuel cap is properly installed or not. The correct installation of the fuel cap is very important, and you must make sure that the fuel cap of your Ford Focus 2010 is properly inserted and tightened. Otherwise, the fuel cap may fall while you are driving, and you will have to buy a new one afterwards. Furthermore, the fuel cap controls the pressure inside the fuel tank as the fuel is extremely volative and it vaporises very easily.