1. Check EGR Temperature Sensor 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.
Disconnect EGR temperature sensor harness connector.
Turn ignition switch ON.

Fig 1: Disconnect EGR Temperature Sensor Harness Connector
Courtesy of NISSAN MOTOR CO., U.S.A.
Check voltage between EGR temperature sensor terminal 1 and ground with CONSULT-II or tester.
1. Voltage: Approximately 5V

OK or NG

OK: GO TO 2.
NG: Repair or replace harness or connectors.

Fig 2: Checking Voltage

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