Home >> BMW >> 2011 >> X6 ActiveHybrid >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Diagnostic Trouble Codes (ACTIVEHYBRID) - DTC P0040, BMW DTC 128008 Through DTC P300F, BMW DTC 138904 >> DTC P112D, BMW DTC 128F04: Oxygen sensor before catalytic converter 2, line fault: Open circuit, virtual earth or pump power supply line >> Fault code