BMS-U012
BMS_u012_Fast_Charger_Incompat
Also written as BMS_U012 / BMS U012 / BMS_u012_Fast_Charger_Incompat / bms_u012_fast_charger_incompat
Why does the exact Tesla alert ID matter?
Record the exact alert ID, including underscores, suffixes, and companion alerts. Tesla alerts that look similar can point to different modules, timestamps, and service procedures.
What does BMS-U012 mean?
Tesla unknown code in the Battery Management System (BMS) module. The battery management system (BMS) has detected that the fast charger is not compatible with the firmware version installed on the vehicle.
Original Description
The battery management system (BMS) has detected that the fast charger is not compatible with the firmware version installed on the vehicle.
Affected Tesla Models
What You May Notice
- BMS-U012 may appear with another Tesla alert in the Battery Management System (BMS) system.
- The vehicle may limit charging, driving, comfort, or safety features depending on the active alerts.
- The alert may clear after sleep, but recurring alerts should be treated as service-relevant.
How to Diagnose and Resolve
- 1 Reboot the vehicle (hold both scroll wheels for 10 seconds)
- 2 Check the Tesla app for any pending software updates
- 3 Monitor the alert over 1–2 charge cycles; schedule service if it recurs
Severity Notes
BMS-U012 is a diagnostic or informational code in the Battery Management System system. Typically no immediate action is required.