Exhaust Gas RECIRCULATION (EGR): Notes

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2000 Nissan Xterra, 2000 Nissan Sentra, 2000 Nissan Quest, 2000 Nissan Pathfinder, and 2000 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

PCM controls EGR system based on engine operating conditions. On Maxima and Sentra, PCM controls ground circuits for EGR Volume Control Valve (EGR-VCV). On all models except Maxima and Sentra, PCM controls ground circuit for EGR Control (EGRC) solenoid. See Fig 1 and Fig 2 . EGR-VCV or EGRC solenoid remains closed under certain conditions including the following:

Engine stopped.
Engine starting.
Engine idling.
Low engine coolant temperature.
Excessively high engine coolant temperature.
High engine speed.
Mass airflow sensor malfunction.

Fig 1: EGR System & Components (Except Maxima & Sentra)

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

Fig 2: EGR System & Components (Maxima & Sentra)

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