BMS family
BMS_a105_SW_One_Module_Tsense
Vehicle may not restart
What does the BMS_a105_SW_One_Module_Tsense alert mean?
The battery management system (BMS) detects that a thermistor on a module is shorted or railed.
What you'll see in your Tesla
- Vehicle may not restart
- Service is required
What triggers it
A battery monitoring board (BMB) detects that any of the thermistors on a module is reporting an out-of-bounds temperature.
When it clears
The BMS detects that the condition clears.
Potential impact
The vehicle operates normally with only one thermistor on the module.
Affected models
Model 3 2017-2023
Model 3 2024+
Model S 2021+
Model X 2021+
Model Y
Model Y 2025+
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.