Ford P0438 OBD-II Trouble Code Definition: P0438 Catalyst Temperature Sensor High Input Bank 2 Sensor 1 P0438 Ford OBD-II Trouble CodeDescription: OBD Trouble Code P0438 Catalyst Temperature Sensor High What does the code mean? OBD-ii Code P0438 definition: The optical sensor provides a high resolution signal to the Powertrain Control Module (PCM) by counting pulses on […]