BMS family
BMS_w172_SW_Drive_Iso_Warning
Vehicle may not restart
What does the BMS_w172_SW_Drive_Iso_Warning alert mean?
The battery management system (BMS) has detected low isolation conditions during multiple drive cycles.
What you'll see in your Tesla
- Vehicle may not restart
- Service is required
What triggers it
The BMS detects that isolation is below the acceptable threshold over the course of multiple drive cycles.
When it clears
The BMS detects that the condition clears.
Potential impact
This alert is primarily informational.
Affected models
Model S 2012-2020
Model X 2015-2020
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Alerts like this reach MyTeslaMate through your car's Tesla telemetry API. MyTeslaMate logs every alert your Tesla reports and turns it into readable history and real-time notifications — hosted TeslaMate with no server to run.