DTC P2271, BMW Hex Code 0x273A, BMW Code 10042: O2 Sensor Signal Biased/Stuck Rich (Bank 1 Sensor 2) (MAX): Remarks
Active trim control (steady-state operation between 2000 and 3000 RPM in part-load range.... min. 120 sec.)
Active trim control (steady-state operation between 2000 and 3000 RPM in part-load range.... min. 120 sec.)