[londons_explore]

Speculating in the failure cause here...

I would guess the Tesla constantly checks the isolation between the high voltage system and the car chassis. If it is ever compromised, it blows single-use pyrotechnic fuses as a safety measure (to protect a person who may have their hands in the high voltage system).

That event then makes the car useless till serviced.

Since it is a kind of 'catch all' event, it happens quite frequently, so it was worth Tesla building an error message into the app for it.

[castratikron]

What's worse, your car won't move or your car gives you a 400V shock when you touch it? It's obvious what the better solution is so that's how it was designed. Things happen sometimes and its always better to fail safe.

Now if the failure mode had been the opposite this would be an entirely different story, even possibly brand ruining.