BMS family
BMS_a152_Isolation_In_Dc_Charge
Not Available
What does the BMS_a152_Isolation_In_Dc_Charge alert mean?
The battery management system (BMS) detects low isolation while DC charging
What you'll see in your Tesla
- Not Available
What triggers it
The BMS detects that isolation resistance on the high voltage (HV) bus has fallen below the acceptable threshold while the vehicle is DC charging
When it clears
The BMS detects that isolation while contactors are closed is above the minimum acceptable threshold
Potential impact
The vehicle will not charge until the charge cable is removed and the alert is cleared
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.