Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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Fuel Pressure Sensor/Switch: Description and Operation

FUEL RAIL PRESSURE SENSOR

The fuel rail pressure sensor is attached to the front of the fuel rail The sensor supplies the current fuel rail pressure to the ECM.

Non-constant fuel system pressure influences the position of a diaphragm inside the sensor This results in a variation in the electrical resistance The fuel rail pressure sensor supplies the appropriate voltage signal to the ECM.