Faulty Exhaust Gas Recirculation (EGR) Valve Position Sensor
EGR Valve Position Sensor harness is open or shorted
EGR Valve Position Sensor circuit poor electrical connection
Engine Light ON (or Service Engine Soon Warning Light)
Exhaust Gas Recirculation Valve Position Sensor Circuit Problem is the generic description for the P1406 Acura code, but the manufacturer may have a different description for your model and year vehicle. Currently, we have no further information
about the P1406 Acura OBDII code.