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Nissan Sentra B18 (2020-2025) Service Manual: Fuel Tank Vacuum Relief Valve

Component Inspection

Component Inspection

  1. CHECK FUEL FILLER CAP

    1. Turn ignition switch OFF.

    2. Remove fuel filler cap.

    3. Wipe clean valve housing.

    4. Install fuel filler cap adapter (commercial service tool) to fuel filler cap.

    5. Check valve opening pressure and vacuum.

      Pressure:

      15.3 – 20.0 kPa (0.156 – 0.204 kg/cm2, 2.22 – 2.90 psi)

      Vacuum:

      −6.0 to −3.4 kPa (−0.061 to −0.035 kg/cm2, −0.87 to −0.49 psi)

    Is the inspection result normal?

    YES >>

    INSPECTION END

    NO >>

    GO TO 2.

  2. REPLACE FUEL FILLER CAP

    Replace fuel filler cap.

    CAUTION:

    Use only a genuine fuel filler cap as a replacement. If an incorrect fuel filler cap is used, the MIL may illuminate.

    >>

    INSPECTION END

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