Home >> BMW >> 2014 >> 750Li >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Self Diagnosis - Diagnostic Trouble Codes - Bank 2 (N63TU) >> Fault Code Tests >> DTC P2272: BMW DTC 12B021; DME -- O2 Sensor Signal Biased/Stuck Lean (Bank 2 Sensor 2) >> Fault effect and breakdown warning