What this usually means
Many dramatic Tesla warnings start with the 12V battery or low-voltage system. Load-test the 12V battery before assuming high-voltage battery or drive-unit failure.
What to ask the workshop before approving repair
- • Show the diagnostic fault codes.
- • Show photo/video proof of the failed part.
- • Give an itemised quote for parts and labour.
- • Explain why cheaper common fixes were ruled out.
- • Use/confirm: Tesla Toolbox
- • Use/confirm: 12V battery load tester
This is not a final diagnosis. It is a money-saving checklist before you go workshop.