General

The EGR system:
^ returns a small amount of exhaust gas into the engine for composition
^ reduces the overall combustion temperature and provides a significant reduction of Oxide Of Nitrogen (NOx)

The EGR valve:
^ is electronically controlled by the Powertrain Control Module (PCM)
^ controls the vacuum to the EGR valve

The EGR valve:
^ is connected to the exhaust manifold by the EGR valve to exhaust manifold tube
^ controls recirculated exhaust gas flow to the intake manifold
^ monitors the flow of recirculated exhaust gases through the EGR valve to exhaust manifold tube
^ returns a signal to the powertrain control module

The amount of recirculated exhaust gas depends upon:
^ engine speed
^ intake manifold vacuum
^ exhaust back pressure
^ engine coolant temperature
^ throttle position

The vehicle emission control information decal:
^ is located on the hood
^ lists the exhaust emission control system information