BMS family
BMS_a091_SW_ChargePort_MIA
Unable to charge
What does the BMS_a091_SW_ChargePort_MIA alert mean?
The battery management system (BMS) detects that the charge port (CP) is missing (MIA).
What you'll see in your Tesla
- Unable to charge
- Service is required
What triggers it
The BMS has not received one or more expected CAN messages from the CP.
When it clears
The BMS receives all expected CAN messages from the CP.
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+
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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.