Home >> Genesis >> 2020 >> G90 3.3T Premium, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis - 3.3L (2 Of 5) >> DTC P0139-00: O2 Sensor Circuit Slow Response (Bank 1/Sensor 2) >> Specification >> HO2S (Bank 1, 2/Sensor 2)