Hi, please try below steps: 1.
Please access 44 Steering Assistance system, security login, then enter
security code 19249. Before accessing basic settings, turn the steering
wheel one turn to the right and one turn to the left to make sure that
the steering wheel is straight with the vehicle wheels pointed
straight.
2.
Access basic settings and select steering angle sensor; then click at
“Start” and it will show that it has been calibrated((When turning the
steering wheel, please select live data monitor to check its
prerequisites and calibration status. Its prerequisites need to be met
before doing calibration ).
3. At the meantime, Steering wheel fault light and Anti-Slip lamp are lit up.
4.
Turn the steering wheel one turn to the left and turn it one turn to
the right to make sure that the steering wheel is straight with the
vehicle wheels pointed straight( after this fault light and Anti-Slip
lamp light are off). G85 steering sensor has been calibrated.
5. Then you just need to do drive test and try to erase codes.
i have solve this problem by this instruction,what happened to your car? i am sure just follow this instruction step by step. but if you failed you should login again. good luck