July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Fuel Pressure Sensor: Description

The fuel pressure sensor monitors and passes on the current rail pressure to the control module. See Fig 1. The non-constant system pressure influences the position of the sensor diaphragm which alters the sensors electrical resistance.

Fig 1: FUEL RAIL AND FUEL PRESSURE SENSOR LOCATIONS

Courtesy of DAIMLERCHRYSLER CORP.

1 - FUEL PRESSURE SENSOR

2 - FUEL RAIL