Ford P0173 OBD-II Trouble Code Definition: P0173 Fuel System 2/1 Rich Control Over Limit P0173 Ford OBD-II Trouble CodeDescription: OBD Trouble Code P0173 Fuel Trim What does the code mean? OBD-ii Code P0173 definition: This code is one that surfaces with certain makes of automobiles more than others. In writing this article I’ve added Mercedes-Benz-specific info […]