Optima L4-2.4L (2001)
Fuel Tank Pressure Sensor: Description and Operation
FUEL TANK PRESSURE SENSOR
The fuel tank pressure sensor is a pressure sensitive variable resistor that measures the change of pressure in the fuel tank to monitor for leaks. It is used
in the EVAP leak test monitoring with the canister close and purge solenoid valves.
This is the sensor to detect the fuel tank leakage in way which it measures the differential pressure between the inside and outside of the fuel tank.
