Noticed a couple of small recently deposited spots of liquid on the driveway under the fuel filler pipe area. Looked around and found a couple of older stains in the drive in the same pattern as the fresh ones. I reached underneath the truck and my hand came back wet with diesel fuel. I drove to the dealership and was told that a fuel Line check valve was bad and that I needed to bring the truck back on Tuesday so they can fix the valve and replace the fuel tank. Truck is a 2016 eco with 6800 miles. They said they needed to order the parts. Has anyone else experienced this?