BMS family
BMS_w149_SW_precharge_too_short
Unable to start vehicle
What does the BMS_w149_SW_precharge_too_short alert mean?
The battery management system (BMS) has detected that the length of time it took the vehicle to precharge was too short.
What you'll see in your Tesla
- Unable to start vehicle
- Service is required
What triggers it
The BMS detected that the voltage on the DC link bus rose faster than expected.
When it clears
The BMS detects that the condition clears.
Potential impact
Inability to charge, drive, or support the low voltage (LV) system
Affected models
Model S 2012-2020
Model X 2015-2020
Track your Tesla's alerts automatically
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.