Home >> BMW >> 2010 >> 760Li >> Repair and Diagnosis >> Engine Performance >> System >> Self Diagnosis - N74 - Diagnostic Trouble Codes - DTC P10C4 (BMW DTC 11B201) Through DTC P12D6 (BMW DTC 12CE01) >> DTC P112C; BMW DTC 128E04: Oxygen sensor before catalytic converter, line fault: open circuit, virtual ground, or pump current lead >> Fault code