WARNING: This page is about a different car, the 2005 Infiniti QX56. However, it is still accessible from the selected car via links, so may be relevant.
Turn EVAP canister vent control valve counterclockwise.
Remove the EVAP canister vent control valve.
Always replace O-ring with a new one.
Fig 1: Turning EVAP Canister Vent Control Valve Counterclockwise