Exhaust Gas Recirculation: Description and Operation

Description
This system recirculates a small amount of exhaust gas into the intake manifold to reduce the combustion temperature, and reduce NOx emissions.
This system consists of the EGR valve, EGR function sensor, solenoid valve, powertrain control module engine (PCME) and input devices.

Operation
Cold Engine: Engine coolant temperature below 70°C (158°F)
EGR operation is stopped to improve driveablity when the engine is cold.

Warm Engine
The PCME controls the solenoid valve to supply EGR gases as described below.




Operation Chart