Home >> BMW >> 2011 >> X6 ActiveHybrid >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Diagnostic Trouble Codes (ACTIVEHYBRID) - DTC P0300, BMW DTC 140001 Through DTC P1408, BMW DTC 193108 >> DTC P033B, BMW DTC 168308: Knock-sensor signal 4, signal: implausible >> Fault code