Battery Management System — Pack Voltage Imbalance
The BMS detected a voltage imbalance between cells or modules exceeding the safe operating threshold.
High-voltage system — do not open battery enclosure.
Estimated Cost
$0 – $16,000
Repair Time
1–3 hours (service appt)
DIY Difficulty
Professional Recommended
Can I Fix This Myself?
Professional Service Recommended
This repair involves high-voltage components or specialized equipment.
What professionals will use:
Use the diagnostic wizard below to gather information for your mechanic, then find a local EV specialist using the ad below.
Check Your Warranty Before Paying
Federal law requires EV battery warranty coverage for 8 years / 100,000 miles minimum. Many manufacturers offer 10-year coverage. An authorized dealership can confirm coverage for your VIN at no charge.
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Step-by-Step Diagnostic Wizard
Answer each question to narrow down the root cause of your BMS_a063 fault.
Check Touchscreen Warning
Step 1 of ~6
Open the Tesla app or look at the instrument panel. Note any battery-related warnings (yellow or red).
Is a battery warning or reduced-range notification visible on the touchscreen?
Need hands-on help?
Find a verified EV mechanic or dealership near you.