Fuel Delivery Pressure Switch
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The fuel delivery pressure switch is a normally closed switch that monitors the fuel delivery system pressure prior to the high pressure fuel injection pump. The fuel delivery pressure switch opens when the fuel system pressure reaches 17.5 kPa (2.5 psi) or above. If the fuel delivery system pressure drops below 17.5 kPa (2.5 psi) the switch closes and the PCM notifies the driver by displaying a low fuel pressure warning in the message center, and an engine derate occurs. The fuel delivery pressure switch is located at the top of the fuel conditioning module.
Typical Fuel Delivery Pressure Switch