DTC P0404: EGR Position Sensor Rationality: Description

EGR system is monitored when engine is running and battery voltage is more than 10.4 volts. DTC will set in Powertrain Control Module (PCM) memory when EGR flow or valve movement is not as expected. Possible causes for DTC to set are: defective EGR sensor, defective PCM, defective connectors or defective wiring.