Ford P0511 OBD-II Trouble Code Definition: P0511 Idle Control System Malfunction P0511 Ford OBD-II Trouble CodeDescription: OBD Trouble Code P0511 Idle Air Control Circuit What does the code mean? OBD-ii Code P0511 definition: This system automatically controls engine idle speed to a specified level. Idle speed is controlled through fine adjustment of the amount of air […]