Home >> BMW >> 2010 >> 550i Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Self Diagnosis - Diagnostic Trouble Codes - DTC P0035 - DTC P0480 (N63 & S63) >> Diagnostic Trouble Codes (DTCS) MSD85 - Bn2020 >> DTC P112C, BMW Hex Code 0x128E02, BMW Code 1216002: O2 Sensor Negative Current or Positive Current Control Circuit/Open (Bank 1 Sensor 1) >> Possible Fault Causes