Ford P0406 OBD-II Trouble Code Definition: P0406 Exhaust Gas Recirculation Temperature Sensor Circuit High Input P0406 Ford OBD-II Trouble CodeDescription: OBD Trouble Code P0406 Exhaust Gas Recirculation Sensor “A” Circuit High What does the code mean? OBD-ii Code P0406 definition: The optical sensor provides a high resolution signal to the Powertrain Control Module (PCM) by counting […]