DTC P1681, BMW Hex Code 0x2D75, BMW Code 11637: Electronic Throttle Control Monitor Level 2/3 Engine Speed Calculation Error (PLAUS): Remarks

The torque monitoring feature compares the torque demand (from accelerator pedal, FGR, electrical equipment, transmission) with the torque provided (calculated from HFM, injector valves, ignition angle, throttle valve angle, differential pressure, lambda). Deviations trigger fuel-supply safety shutdown to prevent vehicle from autonomous acceleration.