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 P013A, BMW DTC 12A308: Oxygen sensor after catalytic converter, dynamic response, from rich to lean: slow response >> Fault code