TSB: Red warning message “Electrical system fault- Stop vehicle safely” -

[Tooney]

https://static.nhtsa.gov/odi/tsbs/2025/MC-11021644-0001.pdf

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[B61]

That’s my error… first, it displayed after charging (Ionity, up to 265kw), as yellow message (inspection necessary) but onky when chargin on DC, over 200kw.
It happened to me three or four times… then it changed to red, during charging, actually after 4 minutes.
After about 45minutes i was able to drive, so i went to next Ionity, about 100km away, where i charged (up to 80%), with yellow message again, so i was able to drive back home.
Yesterday, they replaced “heating unit” that might be the reason for that (2nd replacement)… but yellow message stays.
According to dealer, they’ll replace some “temperature sensor” while battery is OK … so will see next Wednesday

 

[M3Taycan]

After reading the notice, my opinion is that the thresholds were too low, too high, or incorrect to detect a short circuit. Reprogramming to a new set of thresholds should prevent the diagnostic software from triggering the red warning message: "Electrical System Fault - Stop Vehicle Safely."

 

[B61]

Could be…but my dealer said that they are following “the protocol,” so they’ll replace sensor first

 

[prj]

The yellow or red error is just like a check engine light, the only way to know what actually wrong is to scan the car with a diagnostic scanner.

 

[B61]

I know, my car is at Porsche center; they made all necessary tests… hope, they’ll fix it soon.

 

[Flying ace]

Good explanation of the issue that many people experienced. I only incurred this once IIRC.

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