Faulty Shut Off Relay
Shut Off Relay harness is open or shorted
Shut Off Relay circuit poor electrical connection
Engine Light ON (or Service Engine Soon Warning Light)
Cylinder Shut Off Exhaust Valves Open Circuit is the generic description for the P1223 Audi code, but the manufacturer may have a different description for your model and year vehicle. Currently, we have no further information
about the P1223 Audi OBDII code.