BMS family
BMS_a169_SW_FC_Pack_Weld
Unable to charge
What does the BMS_a169_SW_FC_Pack_Weld alert mean?
The battery management system (BMS) detects that one DC (pack) and one FC contactor are welded.
What you'll see in your Tesla
- Unable to charge
- Charge port door must be closed to drive
What triggers it
The BMS detects that one DC (pack) and one FC contactor are welded.
When it clears
The BMS detects that the condition clears.
Potential impact
This alert is primarily informational.
Affected models
Model 3 2017-2023
Model 3 2024+
Model S 2021+
Model X 2021+
Model Y
Model Y 2025+
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