What this usually means
Taycan no-wake or warning issues often begin with the 12V system or software state, not the high-voltage battery. Ask for PIWIS fault history and 12V load test before high-voltage diagnosis.
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: PIWIS
- • Use/confirm: 12V battery load tester
This is not a final diagnosis. It is a money-saving checklist before you go workshop.