Ford P0448 OBD-II Trouble Code Definition: P0448 EVAP System Vent Control Circuit Shorted P0448 Ford OBD-II Trouble CodeDescription: OBD Trouble Code P0448 Evaporative Emission System Vent Control Circuit Shorted What does the code mean? OBD-ii Code P0448 definition: The optical sensor provides a high resolution signal to the Powertrain Control Module (PCM) by counting pulses on […]