BMS family
BMS_u020_Cannot_Precharge_FC
Unable to DC Fast Charge
What does the BMS_u020_Cannot_Precharge_FC alert mean?
The battery management system (BMS) is unable to precharge for DC fast charging.
What you'll see in your Tesla
- Unable to DC Fast Charge
- Try AC charging / Supercharging
What triggers it
The BMS detects a condition that prevents the vehicle from being able to precharge for DC fast charging.
When it clears
The BMS detects that the condition clears.
Potential impact
Inability to DC fast charge.
Affected models
Model S 2012-2020
Model X 2015-2020
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.