This can be a sign there is a leak in the air suspension, this is going on my own experience. I have an issue with the front dropping overnight because of a slow leak, instead of the Air suspension controller actually being 'smart' and telling you there is a height difference (or even a problem at all) it just defaults to being in Jack mode...why is there no notification to the driver this is the case?. When I turn off Jack mode (a daily necessity) I see the front auto raise to the height it was at.
OK,
I got back from the service center a few hours ago.
They inspected the sensors in my wheels. They said it all looks good. They are still reasonably certain that it is a firmware issue.
I got an explanation from the service center as to what the technicians believe is causing the spontaneous Jack Mode issue with my car.
I’ll do my best to accurately paraphrase what I was told:
Basically it’s a timing/communications issue which I assume, may not affect all configurations the same.
My car is a 2018 Model S 100D AEP 2.5/MCU2 with the new part AIR SPRING MODULE FR - MS2 DM (1067361-77-C) Front Right & Front Left.
They do not however believe that the new airspring modules have anything to do with the issue and that it would’ve occurred even if I hadn’t had them replaced.
Apparently, there is some sort firmware issue that results from the “Suspension computer” waking up as little as milliseconds before the rest of the car. The “Suspension Computer” sends a signal to the main computer as to its status. By the time the main computer is awake it has missed communication And assumes there is an issue with the suspension system and puts it in to fail safe (Jack Mode)
Apparently this is an issue that had occurred in a previous version of software that was fixed.
The belief is that it has somehow come back.
I was told that the fix is now in the works and will appear soon in an upcoming software release.