BMS family
BMS_a087_SW_Feim_Test_Blocked
Not Available
What does the BMS_a087_SW_Feim_Test_Blocked alert mean?
The Battery Management System (BMS) detects a Force External Isolation Test (FEIM) is required but is blocked due to a condition on the vehicle.
What you'll see in your Tesla
- Not Available
What triggers it
The BMS detects the FEIM is blocked due to another condition on the vehicle. Alert log signal data should provide more information on the specific reason.
When it clears
The FEIM is no longer blocked and is able to run.
Potential impact
The vehicle may be unable to drive.
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.