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Home >> Subaru >> 2017 >> WRX STI Limited >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel Injection System (2.5L) >> Fuel Level Sensor >> Inspection
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Fuel Level Sensor: Inspection

  1. Check that the fuel level sensor has no damage.
  2. Measure the fuel level sensor float position.
    NOTE: When inspecting the fuel level sensor, perform the work with the sensor installed to the fuel pump.
    Fig 1: Fuel Level Sensor Float Positions
    G11571689Courtesy of SUBARU OF AMERICA, INC.
    Float position Standard
    FULL to Fuel tank seating surface (A) 135±4 mm (5.315±0.157 in)
    EMPTY to Fuel tank seating surface (B) 23.7±4 mm (0.933±0.157 in)
  3. Measure the resistance between fuel level sensor terminals.
    Fig 2: Measuring Resistance Between Fuel Level Sensor Terminals
    G08538912Courtesy of SUBARU OF AMERICA, INC.
    Float position Terminal No. Standard
    FULL (A) 1 and 4 8.7±1.0 Ω
    EMPTY (B) 139.1±2.0 Ω
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