Ford P0427 OBD-II Trouble Code Definition: P0427 Catalyst Temperature Sensor Low Input Bank 1 Sensor 1 P0427 Ford OBD-II Trouble CodeDescription: OBD Trouble Code P0427 Catalyst Temperature Sensor Low What does the code mean? OBD-ii Code P0427 definition: The optical sensor provides a high resolution signal to the Powertrain Control Module (PCM) by counting pulses on […]