Ensuring you are Ready for the Road Ahead , the Dorman Exhaust Gas Recirculation Differential Pressure Sensor effectively monitors the pressure difference between the exhaust gas upstream and downstream of the Exhaust Gas Recirculation (EGR) system. This EGR Differential Pressure Sensor then relays information regarding the pressure differentials throughout the EGR system back to the Engine Control Unit (ECU). The ECU take action by adjusting the EGR’s flow rate for optimal combustion process. Dorman has a distinguished reputation in the heavy duty truck and trailer aftermarket, manufacturing a variety of parts for a complete repair. Through advanced engineering, Dorman successfully checks into today’s most common failures to figure out the why, ultimately delivering modern solutions that not only match OEM parts, but solve known issues. FleetPride is your First Click in Heavy Duty .