In respect to .....
sydo wrote: Yesterday, 18:04
The steering angle sensor calibration cannot be performed.
It took my a number of goes (3) to recalibrate my steering angle sensor on my C5, (X7), I was getting very frustrated so went back to the the beginning. All tyre pressures and tracking have to correct. You will need a very flat piece of car park to drive the car in a very straight line, any slight camber messes things up, as well as accelerating and braking, ideally perform the procedure on tick over and DON'T touch any thing.
I used Diagbox on a laptop with a good battery.