You should call the Tesla Roadside Service number, they should be able to read any codes.
If you call using your phone number registered with your car, they will have the info
before you tell them about the problem, without you having to identify yourself, or
your car in any way. It appears that your registered phone number is recognized by
their answering computer, it contacts your car, and has the important information
already on the screen for the human who gets assigned your call. Very slick indeed.
Also, the registered number is the one that they use by default to call you back
when checking up on you. I had my home number registered, and (sitting in
my car at a SpC) I did not get their return call. So, realizing how it works, I
registered my cell number instead ... and later, at a roadside "emergency",
I found out just how nicely their system works ... ring, ring, ... we see you are
parked, and see nothing wrong with the car ... How can we help you?
My car "lost power" on the freeway, and I managed to coast to the side
and get safely parked, but then could not get it to move. New-Driver error,
I had accidently shifted into Neutral when a rain started. The problem was
so common that they added a warning message for the situation in the
next software update. Splendid help.