BMS_w150_SW_precharge_too_long
Vehicle may not restart
What does the BMS_w150_SW_precharge_too_long alert mean?
The battery management system (BMS) detects that it is taking too long to reach the target precharge voltage and prevents packs contactors from closing. This indicates that the voltage on the DC link bus rose more slowly than expected.
What you'll see in your Tesla
- Vehicle may not restart
- Service is required
What triggers it
The BMS detects that the voltage on the DC link bus is rising slower than it should be. Alert log signal data provides information on the specific condition(s) detected.
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
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.