Sudden Change of FSD to older version

[Aggi]

My 2018 Model X FSD changed suddenly to a very older version and FSD stopped working for stop lights and lane changes. Asking permission to lane change. Came home and reset the car. Still it went back to old version and FSD is not functioning suddenly. My FSD software is up to date. I put a service request.
Any suggestions? Is this happened to any others? Thanks

 

[EVRider-FL]

Which build did you have before and which one do you have now? Did you make sure FSD Beta is enabled under Controls > Autopilot?

Service can’t help with software issues, so don’t waste your time and theirs by bringing the car in.

 

[Supcom]

Which build did you have before and which one do you have now? Did you make sure FSD Beta is enabled under Controls > Autopilot?

Service can’t help with software issues, so don’t waste your time and theirs by bringing the car in.

I agree that FSD beta is likely not enabled and the car has fallen back to NOA.

 

[MSJack]

Which build did you have before and which one do you have now? Did you make sure FSD Beta is enabled under Controls > Autopilot?

Service can’t help with software issues, so don’t waste your time and theirs by bringing the car in.

Sometimes after a software has completed some settings get reverted back to the default options

 

[Dewg]

Camera recalibration will reset settings as well

 

[Thp3]

My 2018 Model X FSD changed suddenly to a very older version and FSD stopped working for stop lights and lane changes. Asking permission to lane change. Came home and reset the car. Still it went back to old version and FSD is not functioning suddenly. My FSD software is up to date. I put a service request.
Any suggestions? Is this happened to any others? Thanks

It is pointless to talk about firmware when the actual numeric version is not referenced.

What version do you have? It’s listed in the Tesla app at the bottom of the screen.
2023.?.?

Also it is easy to reset your selected FSD options in the car and in each profile. Are you setting FSD on in the profiles in the car?