1. Check Harness Connector
WARNING: This page is about a different car, the 2004 Nissan Titan. However, it is still accessible from the selected car via links, so may be relevant.
Check combination meter and fuel level sensor unit and fuel pump terminals (meter-side, and harness-side) for poor connection.
OK or NG
OK >> GO TO 2
NG >> Repair or replace terminals or connectors.