Ford P0508 OBD-II Trouble Code Definition: P0508 Idle Air Control Valve Sense Circuit Low P0508 Ford OBD-II Trouble CodeDescription: OBD Trouble Code P0508 Idle Air Control System Circuit Low What does the code mean? OBD-ii Code P0508 definition: The ECM controls the engine idle speed to a specified level through the fine adjustment of the air, […]