6.7L Power Stroke – Fuel Pressure Switch (FPS)

The fuel pressure switch is mounted in the fuel line that runs between the secondary fuel filter and the high pressure fuel pump.
The FPS has a 48-58 psi-gauge set- point for detection of a low pressure fuel supply. The PCM de-rated the engine’s power by 30% if the switch is triggered.
The FPS protects the high pressure fuel system from damage due to low fuel pressure supply.
LOW FUEL PRESSURE is displayed in the message center to advise the customer of a low fuel pressure concern.