Connect X431 interface to Buick New Lacrosse obd port, then run X431 soft.
After enter into ESP system，Read 6 error code：
U0073 communication Bus line A control module closed；
U0100 lost communication with engine control module；
U0140 lost communication with car body control module；
U0125 lost communication with multi-axis acceleration sensor module；C0242 Power system module display traction control；
C0710 6/5000 Steering position signal
Select New Lacrosse
System Selection–> Electronic Brake control module
Select Electronic Brake control module version according to vehicle configuration
Select config /reset，The learning function of the steering wheel Angle sensor is usually in the configuration/reset function.
Select steering angle sensor learning function
Follow the instructions to set the correct direction so that the front wheel of the vehicle is facing forward and the steering wheel is centered ，click”confirm”
Click Confirm，The steering wheel Angle sensor learning function begins，send instructions。The function data flow condition is: the vehicle stops, the place.It has a wheel speed of 0.
After satisfying all conditions，waiting for 5~10s，prompt function execution is finshed.see pic13，Then switch off the ignition.
Switch on the ignition, check the dashboard prompt info，The original display information has disappeared。Re-enter into electronic brake control module, clear error code, then do verification when running the car, if everything is normal ,the error is solved.
If you want to know more cases about Buick, please refer to Buick Trouble Repair.