BMS family
BMS_a158_SW_HVP_HVI_Comms
Vehicle may not restart
What does the BMS_a158_SW_HVP_HVI_Comms alert mean?
The battery management system (BMS) reports a communication issue with the high voltage processor (HVP).
What you'll see in your Tesla
- Vehicle may not restart
- Service is required
What triggers it
The BMS is not receiving the expected messages from the HV system.
When it clears
The BMS is receiving all expected messages from the HV system.
Potential impact
Inability to charge, drive, or support the low voltage (LV) system
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.