Home >> BMW >> 2011 >> X6 ActiveHybrid >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Diagnostic Trouble Codes (ACTIVEHYBRID) - DTC P15E0, BMW DTC 20A001 Through DTC U1179, BMW DTC CDC308 >> DTC P15C4, BMW DTC 215901: Intelligent battery sensor (IBS): Incorrect version >> Fault code