1. Check Air Fuel Ratio (A/F) Sensor 1 Power Supply Circuit

WARNING: This page is about a different car, the 2004 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

Turn ignition switch OFF.
Loosen and retighten engine ground screws.

Fig 1: Locating Engine Ground Screws
Courtesy of NISSAN MOTOR CO., U.S.A.
Disconnect air fuel ratio (A/F) sensor 1 harness connector.

Fig 2: Disconnect Air Fuel Ratio (A/F) Sensor 1 Harness Connector
Courtesy of NISSAN MOTOR CO., U.S.A.
Turn ignition switch ON.
Check voltage between A/F sensor 1 terminal 3 and ground with CONSULT-II or tester.
1. Voltage: Battery voltage

OK or NG

OK: GO TO 3 .
NG: GO TO 2.

Fig 3: Check Voltage

Courtesy of NISSAN MOTOR CO., U.S.A.