XJ (X350) V8-4.2L SC (2004)
Fuel Temperature Sensor: Description and Operation
Engine Fuel Temperature Sensor
The EFT sensor continuously monitors the temperature of fuel being injected into the engine; this value is used by the ECM to provide compensation for
the changing flow-characteristics of the fuel system with temperature. The ECM therefore ensures that engine performance is unaffected by temperature
changes in the fuel supply.