Ford P0451 OBD-II Trouble Code Definition: P0451 Fuel Tank Pressure Sensor Range/Performance P0451 Ford OBD-II Trouble CodeDescription: OBD Trouble Code P0451 Evaporative Emission System Pressure Sensor/Switch Range/Performance What does the code mean? OBD-ii Code P0451 definition: The EVAP control system pressure sensor detects pressure in the purge line. The sensor output voltage to the ECM increases […]