I have a 2006 Mustang 4.0 V6 . The fuel pump was replaced by Ford. on 2006 Ford Mustang

When they put the Pump in it read fine . Know all of a sudden it only goes up to 3/4 full when the tank is full. Is this something that can be corrected by Ford with a computer?

Asked by for the 2006 Ford Mustang
it is probably the sending unit inside the tank