I'm new to this forum too. 2010 Ford Fusion SEL. Love it. Only had it a few months. Approximately 67K miles. Great condition. I recently moved to San Antonio area for work. The last leg of the trip the "Check Fuel Fill Inlet" came on. After a while the "Check Engine Light" came on. Mine is the cap free gas tank. Yippee! ! I've checked for possibly air leaks. One small trick you can try, I found it on YouTube is the unhook the (-) cable from the battery. Take a plastic funnel and shove it in and out several times. If you have an air compressor with a spray attachment spray into the funnel, around it. Some times dirt and particles might get in there. Then spray just a little bit of WD40 and take your funnel and do it again for several times. Spray with your compressed air all around to free up and dirt or particles that may have worked it's way in. Reconnect your (-) battery cable and it will go over. See if it comes back after several crank cycles. If it does, get to a dealer. They should know. I've already researched it to see if it's a defect. Nothing major reported. Not a big fan of a capless fuel tanks.