Ford P0174 OBD-II Trouble Code Definition: P0174 Fuel Trim System Lean Bank 2 P0174 Ford OBD-II Trouble CodeDescription: OBD Trouble Code P0174 System Too Lean What does the code mean? OBD-ii Code P0174 definition: Basically this means that an oxygen sensor in bank 2 detected a lean condition (too much oxygen in the exhaust). On V6/V8/V10 […]