Ford P0404 OBD-II Trouble Code Definition: P0404 Exhaust Gas Recirculation Control Circuit Range/Performance P0404 Ford OBD-II Trouble CodeDescription: OBD Trouble Code P0404 Exhaust Gas Recirculation Control Circuit Range/Performance What does the code mean? OBD-ii Code P0404 definition: The EGR (Exhaust Gas Recirculation) system’s purpose is to redirect exhaust gas back into the cylinders. Since exhaust gas […]