The function of the EGR valve is to control the flow of recirculated exhaust gases depending on the engine load. For Peugeot For Expert For Partner 1618.LN EGR Valve. The EGR valve redirects accurately metered exhaust gases into the engine's intake system to improve engine efficiency and reduce fuel consumption and NOx emissions. Exhaust gas recirculation systems affect fuel consumption in gasoline engines. It improves overall engine efficiency, resulting in a more stable idle, better fuel efficiency, and reduced oil pollution., Manufacturer: ROUSHI