P0191 FORD -

Question

have a 2006 ford f250 with a 5.4 engine .Runs ok for a while then will not start.code p0191 comes up. changed the fuel filter but it still wont re start.

Answer 1

Hi there,

This code can be caused by low or no fuel pressure. You should check the fuel pressure at the rail to see if that is the issue. You can also try spraying some carb cleaner into the intake and then see if the truck will fire on it. That's usually a pretty good indication of a problem with the fuel pump.