EGR System - Diesel: Description

The Exhaust Gas Recirculation (EGR) system is designed to control the formation of NOx emission by recirculating the exhaust gas into the intake manifold passage through the control valve.

On Maxima models, the system consists of a crankcase emission control valve, EGR control valve, throttle chamber, potentiometer, revolution sensor, water temperature sensor, solenoid valves, EGR control unit, injection timing control solenoid valve, and altitude compensator.

On Sentra models, the system consists of an EGR control valve, EGR control unit, throttle chamber, potentiometer, revolution sensor, solenoid valve, water temperature sensor, (high altitude models include; altitude compensator, and EGR control unit).