BMS_f009_SW_Pos_Contactor_Drive
Service is required
What does the BMS_f009_SW_Pos_Contactor_Drive alert mean?
There is an issue with the positive contactor drive circuit. This alert may indicate an open contactor drive circuit, a falsely closed contactor loop, an increase in the contactor coil current during economized operation, or that a contactor has popped open during operation.
What you'll see in your Tesla
- Service is required
- Schedule service now
What triggers it
The battery management system (BMS) detects unexpected current through the positive contactor drive circuit.
When it clears
The BMS detects nominal current through the positive contactor drive circuit.
Potential impact
Inability to charge, drive, or support the low voltage (LV) system
Affected models
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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.