Possible Causes

WARNING: This page is about a different car, the 2012 Ford Pickup, 2012 Ford F550 Super Duty, 2012 Ford F450 Super Duty, and 2012 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

No fuel in the tank
Fuel gelled
Fuel quality
Aeration
Biodiesel-water separation, seal degradation, corrosion
Restricted fuel filters
Fuel supply line broken or crimped
Corrosion to fuel system components
Pickup tube screen in tank restricted