Going 40 MPH on CA 210W in left lane. Full Self Driving available on vehicle but no autopilot/lane assist activated at time of incident. Steering wheel locked up completely; I was unable to turn the wheel at all so I ended up drifting across 4 lanes of highway (miraculously didnât hit anyone) and ended up under a semi. Car airbags did not deploy and system did not detect a collision. Contacted Tesla to ask about the cause of the accident multiple times; never got an answer. They had us pull the USB in glovebox and see if anything is on there but there wasnât even though dash cam was activated. They âescalatedâ the ticket to a supervisor and have been ghosted ever since asking for an answer. We scheduled a service appointment to have them check out the vehicle and they canceled it. It is a miracle that I did not die; I have severe PTSD from the incident which has affected my career negatively. I would like Tesla to take accountability for things like this; itâs scary that they donât and threaten legal action instead.