Ford P0172 OBD-II Trouble Code Definition: P0172 Fuel Injection System Too Rich Bank 1 P0172 Ford OBD-II Trouble CodeDescription: OBD Trouble Code P0172 System Too Rich What does the code mean? OBD-ii Code P0172 definition: Basically this means that an oxygen sensor in bank 1 detected a rich condition (too little oxygen in the exhaust). On […]