Ford P0444 OBD-II Trouble Code Definition: P0444 Evaporative Emission Control System Purge Control Valve Circuit Open P0444 Ford OBD-II Trouble CodeDescription: OBD Trouble Code P0444 Evaporative Emission System Purge Control Valve Circuit Open What does the code mean? OBD-ii Code P0444 definition: The optical sensor provides a high resolution signal to the Powertrain Control Module (PCM) […]