(EGR) System: Purpose
The exhaust-gas-recirculation (EGR) system reduces harmful NOx emissions that contribute to air pollutions by recirculating exhaust gas back through the intake manifold into the engine.
There, it acts as a cooling agent to lower combustion temperatures.
All this is done with the intention of preventing mono-nitrogen oxides (NO and NO2) from forming in the engine and being expelled through the tailpipe into the atmosphere.
TIP: If an EGR valve becomes clogged with carbon deposits, the “Check Engine” light will likely come on and a code will show insufficient flow.
Don’t miss a weekly “You Auto Know” automotive tip. CLICK HERE to sign up. Please drive safely.
Have vehicle concerns? CLICK HERE for our FREE CHECKLIST 5 Common Transmission Concern MISTAKES before you contact a repair shop.