Ford P0685 OBD-II Trouble Code Definition: P0685 Electronic Control Module Power Control Circuit Malfunction P0685 Ford OBD-II Trouble CodeDescription: OBD Trouble Code P0685 ECM/PCM Power Relay Control Circuit /Open What does the code mean? OBD-ii Code P0685 definition: The Engine Control Module (ECM) has detected that the ECM remains powered up after the ignition key has […]