Home >> Genesis >> 2020 >> G90 3.3T Premium, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis - 3.3L (5 Of 5) >> DTC P2254-00: O2 Sensor Reference Ground Circuit/Open (Bank 2 Sensor 1) >> Specification >> HO2S (Bank 1, 2/Sensor 1)