Hi Mishek

Glad to hear you found a steering fault, there is no need to reset the controller, once the fault is repaired, the truck will run as normal.
Error 28 generally refers to the steering sensor at the steering wheel.

The sensor is located directly underneath the steering wheel.
With the steer motor seized the bottom pot would not move in time with the steering wheel movement.
The controller would then flag up a fault and would not allow the drive to function.
Hopefully when you fit the repaired motor, everything will return to normal, job done.