High Voltage Battery Performance Limited (Range and Charging Reduced)
The TESLA-BMS_A067 (Tesla BMS (Battery Management System)) EV fault code means: High Voltage Battery Performance Limited (Range and Charging Reduced). This is a moderate severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- expert
- Estimated cost
- Diagnosed and quoted by Tesla service; cost depends entirely on the internal battery condition found, ranging from minor service to major pack work. Battery-related repairs may be covered by the battery and drive unit warranty (8 years on current models, with mileage caps that vary by model) — check your coverage before paying out of pocket.
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Common Symptoms
- Alert on the touchscreen: "High voltage battery performance limited — OK to drive - Schedule service soon"
- Reduced maximum range compared to before the alert appeared
- Charging takes longer than it used to
- Over time, may progress to reduced power and acceleration if not serviced
Probable Causes (Ranked by Likelihood)
- A condition internal to the high-voltage battery pack that is limiting the battery's performance (Tesla's official description — the specific internal cause is determined at service) Likely
- Firmware-level alert name (BMS_a067_CAC_Imbalance_Limiting, per tessie fleet data) indicates the internal condition is a capacity imbalance between cell groups in the pack Possible
Step-by-Step Diagnostic Procedure
This alert is set by the battery management system for a condition inside the high-voltage pack; there is no owner-serviceable component, and high-voltage work should never be attempted DIY.
Per Tesla's official guidance, schedule service at your earliest convenience — without service the vehicle may continue to lose range and charging performance, and may begin to show reduced power and acceleration.
While the alert is present, Tesla recommends keeping the battery charged to 30% or higher so the displayed range estimate stays aligned with the actual charge level.
Note any companion BMS alerts on the screen or in the Tesla app — they help service narrow down the internal condition.
Frequently Asked Questions
What does BMS_a067 mean on a Tesla?
Tesla's official meaning: the vehicle has detected a condition internal to the high-voltage battery that is limiting the battery's performance. Maximum range may be reduced and charging may take longer. Service is required to restore full performance.
Can I keep driving with BMS_a067?
Yes — Tesla's official guidance is that the vehicle is OK to drive, but you should schedule service at your earliest convenience. Without service, range and charging performance may keep degrading, and power and acceleration may eventually be reduced too.
Why does Tesla say to keep the battery above 30% with this alert?
While BMS_a067 is present, the range estimate shown on the touchscreen can drift from the battery's actual charge level. Keeping the charge at 30% or higher avoids being caught out by that discrepancy.
Sources
This page is built from documented references. Verify against your own service info before repair work.