BMS-A079
BMS_a079_Unable_to_charge__Maximum_charge_level_reached
Also written as BMS_A079 / BMS A079 / BMS_a079_Unable_to_charge__Maximum_charge_level_reached / bms_a079_unable_to_charge__maximum_charge_level_reached
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-A079 mean?
Tesla alert BMS_a079 means the vehicle has detected an internal high-voltage battery condition that can limit the maximum charge level, commonly around 50% state of charge. Do not use this page as drive-clearance; check the vehicle display for restrictions and schedule Tesla Service if the alert persists.
Original Description
Unable to charge - Maximum charge level reached. Reduced maximum charge level - Schedule service.
Affected Tesla Models
What You May Notice
- Unable to charge or charging stops with maximum charge level reached
- Maximum charge level or range is reduced, often near 50% state of charge
- The vehicle may show charge complete even though the displayed state of charge is low
- Related BMS alerts such as BMS_a067 or BMS_a074 may appear at the same time
How to Diagnose and Resolve
- 1 Record the exact alert ID, charging limit, state of charge, odometer, software version, and any companion BMS alerts
- 2 Check the Battery and Drive Unit warranty status in the Tesla app before approving paid repair work
- 3 Avoid long trips, deep discharge, or assuming the vehicle is cleared for normal use until the alert is inspected
- 4 Schedule Tesla Service if the alert persists; do not attempt high-voltage battery repair outside qualified service
Severity Notes
BMS-A079 is an Alert in the Battery Management System system. Confirm the vehicle screen and Tesla app show no driving or charging restrictions, and schedule service if the alert returns.