Ford P0740 OBD-II Trouble Code Definition: P0740 Torque Converter Clutch Circuit Malfunction P0740 Ford OBD-II Trouble CodeDescription: OBD Trouble Code P0740 Torque Converter Clutch Circuit/Open What does the code mean? OBD-ii Code P0740 definition: The torque converter clutch solenoid valve is activated, with the gear in D4, by the Transmission Control Module (TCM) in response to […]