Fuel Tank Vacuum Relief Valve (Built Into Fuel Fuller Cap)

WARNING: This page is about a different car, the 2005 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.

Wipe clean valve housing.

Fig 1: Cross-Sectional View Of Fuel Tank Vacuum Relief Valve (Built Into Fuel Fuller Cap)
Courtesy of NISSAN MOTOR CO., U.S.A.
Check valve opening pressure and vacuum.
- Pressure: 15.3- 20.0 kPa (0.156 - 0.204 kg/cm ² , 2.22 - 2.90 psi)
- Vacuum: 6.0 to -3.3 kPa (-0.061 to -0.034 kg/cm ² , -0.87 to -0.48 psi)
If out of specification, replace fuel filler cap as an assembly.
CAUTION: Use only a genuine fuel filler cap as a replacement. If an incorrect fuel filler cap is used, the MIL may come on.

Fig 2: Checking Valve Opening Pressure Vacuum
Courtesy of NISSAN MOTOR CO., U.S.A.