Exhaust Gas RECIRCULATION: Notes
NOTE:
For additional information on the Exhaust Gas Recirculation (EGR) system, see appropriate SYSTEM & COMPONENT TESTING article.
The EGR system limits formation of oxides of nitrogen (NOx) emissions by reducing peak combustion chamber temperatures in which NOx is formed. EGR system consists of an EGR valve, EGR vent/EGR solenoids and EGR fault detection. A vacuum pump is required to provide a vacuum source to operate the EGR system.