- Vehicles
- Cars
High voltage battery performance limited
Tesla BMS_a067 on Model 3: high voltage battery limited
Risk level
Medium
Proceed carefully and stop if the check is unclear.
Urgency
Medium
Quick answer
BMS_a067 (and BMS_a068) mean the Tesla detected a condition inside the high voltage battery that limits its performance. It is OK to drive, but schedule service soon and keep the charge at 30% or higher while the alert stays.
Safety first
Stop and check this first
- On an electric Tesla, orange cables, the traction battery and their connectors carry high voltage: do not open, touch or disconnect them; only a workshop trained in high voltage should work on them.
- Tesla warns that without service the car may start to show reduced power and acceleration while driving.
Safe checks you can perform
- Exact alert code
- Keep at least 30% charge
- Compare range and charge time with usual
Leave these tasks to a qualified professional
- Do not attempt this professional task: Battery state-of-health report for the BMS_a067 alert
- Do not attempt this professional task: Stored codes behind the BMS_a067 alert
- Do not attempt this professional task: High-voltage isolation test after the BMS_a067 alert
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Battery state-of-health report for the BMS_a067 alert
What they doThe workshop pulls the high-voltage battery report with Tesla's tool: estimated state of health (SOH), module voltages and the temperatures logged when the BMS_a067 alert appeared.
They must show youthe battery state-of-health report with the date it was read.
In writingthe state of health read, whether any module is outside what Tesla accepts and whether the proposed repair falls under the battery warranty.
Stored codes behind the BMS_a067 alert
What they doAt a workshop with EV-trained technicians, they connect a Tesla-capable diagnostic tool and read the stored and pending codes from the battery management system (BMS) and charging system, with the time and conditions in which the BMS_a067 alert was logged, before clearing anything.
They must show youthe code list with status, read while the BMS_a067 alert is active or freshly logged.
In writingthe codes read, the system they point to and which test confirms the fault before any part is replaced for the BMS_a067 alert.
High-voltage isolation test after the BMS_a067 alert
What they doA technician qualified for high voltage, with the car unplugged and following Tesla's safety procedure, measures the isolation of the high-voltage circuit with the manufacturer's equipment and inspects orange cables and connectors.
They must show youthe measured isolation value against Tesla's specification and the condition of the cables and connectors checked.
In writingthe isolation test result, who did it with high-voltage training and whether it explains the BMS_a067 alert.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Exact alert code
- Who:
- you, on the touchscreen.
- How:
- open the alert and note the code (BMS_a067 or BMS_a068) and its second line.
- Result that matters:
- whether it says only performance limited or also reduced acceleration and charging.
- If it is BMS_a068:
- expect lower top speed and slower response; leave extra margin when overtaking and book service as soon as you can.
- If it is BMS_a067:
- it is OK to drive; Tesla warns that without service it can get worse and reduce power.
- Evidence to keep:
- photo of the alert with code and date.
Evidence: Tesla Model 3 owner manual: troubleshooting alerts · Tesla Model 3 manual del propietario: solución de problemas relacionados con alertas
Keep at least 30% charge
- Who:
- you, when planning charging.
- How:
- while the alert is active, do not let the battery drop below 30% of capacity.
- Result that matters:
- avoiding a gap between displayed range and the real charge.
- If estimated range drops sharply below 30%:
- this is what Tesla wants to avoid; charge earlier and note it for service.
- If you stay at 30% or more:
- the range estimate is more reliable until the appointment.
- Evidence to keep:
- screenshots of range and percentage before and after each charge.
Evidence: Tesla Model 3 owner manual: troubleshooting alerts · Tesla Model 3 manual del propietario: solución de problemas relacionados con alertas
Compare range and charge time with usual
- Who:
- you, using your usual charger.
- How:
- compare range at your usual charge limit and charging time with previous weeks on the same charger.
- Result that matters:
- whether the drop is clear and still getting worse.
- If it keeps dropping:
- Tesla warns range and charging can keep falling without service; bring the appointment forward.
- If it is stable:
- keep the appointment anyway; the alert still asks for service.
- Evidence to keep:
- log of range and charge times by date.
Evidence: Tesla Model 3 owner manual: troubleshooting alerts · Tesla Model 3 manual del propietario: solución de problemas relacionados con alertas
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Vehicles
- Brand
- Tesla
- Product type
- Cars
Known code variants
- Acceleration and charging performance reduced
- Batería de alto voltaje con rendim. limitado
- BMS_a067
- BMS_a068
- High voltage battery performance limited
- High voltage battery requires service
- La batería de alta tensión requiere servicio
- Prestaciones de aceleración y carga reducidas
- Tesla batería alta tensión rendimiento limitado
- Tesla HV battery performance limited
What it means
The battery management system (BMS) monitors the high voltage battery and alerts when an internal condition limits its performance. With BMS_a067 maximum range may drop and charging may take longer; with BMS_a068 top speed and acceleration response also drop. Tesla says service is required to restore full performance. The alert does not say which module or sensor causes the limit: only a battery diagnosis shows that.
Warnings and stop conditions
- Higheditorial warning
On an electric Tesla, orange cables, the traction battery and their connectors carry high voltage: do not open, touch or disconnect them; only a workshop trained in high voltage should work on them.
Evidence: Tesla Model 3 owner manual: troubleshooting alerts · Tesla Model 3 manual del propietario: solución de problemas relacionados con alertas
- Mediumsource verified
Tesla warns that without service the car may start to show reduced power and acceleration while driving.
Evidence: Tesla Model 3 owner manual: troubleshooting alerts · Tesla Model 3 manual del propietario: solución de problemas relacionados con alertas
Symptoms and causes
Probable causes · in order
- Condition inside the high voltage batteryCommon
This is the cause Tesla gives for both alerts. It shows as less range and slower charging than before, not as a sudden failure.
Evidence: Tesla Model 3 owner manual: troubleshooting alerts · Tesla Model 3 manual del propietario: solución de problemas relacionados con alertas
- Limit now affecting driving (BMS_a068)Possible
If top speed and acceleration also feel reduced, it is a068, which Tesla describes as reduced acceleration and charging performance.
Evidence: Tesla Model 3 owner manual: troubleshooting alerts · Tesla Model 3 manual del propietario: solución de problemas relacionados con alertas
- Slow charging caused by the power sourcePossible
Tesla notes that maximum charge rate varies with location, power source and equipment. Slow charging without the alert active does not point to the battery.
Evidence: Tesla Model 3 owner manual: troubleshooting alerts · Tesla Model 3 manual del propietario: solución de problemas relacionados con alertas
Virtual technician
Does High voltage battery performance limited still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
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