Battery Management System — Charge Port Fault
The TESLA-BMS_A063 (Tesla BMS (Battery Management System)) EV fault code means: Battery Management System — Charge Port Fault. This is a serious severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- moderate
- Estimated cost
- $0 if fault is usage-driven and clears after cool-down. Coolant top-off DIY is $15-$30 (use only Tesla-approved coolant). Coolant pump replacement runs $300-$700 at an independent EV shop. Chiller or refrigerant service is $200-$600 at a shop. Tesla service center diagnosis alone may run $150-$300 before parts.
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Common Symptoms
- Alert BMS_A063 shown on the touchscreen
- The vehicle may log the alert without any change the driver notices
Probable Causes (Ranked by Likelihood)
- The vehicle reported BMS_A063. Tesla's firmware identifies this alert as "BMS_a063_SW_ChargePort_Fault" — the battery controller reporting a fault in the charge port circuit. High
Frequently Asked Questions
What does BMS_A063 mean?
Battery Management System — Charge Port Fault. Tesla's firmware identifies it as "BMS_a063_SW_ChargePort_Fault".
Can a generic OBD2 scanner read this?
No. Tesla alerts are a manufacturer-specific system and appear in no SAE standard, so a generic OBD-II scan tool cannot read or clear them. The alert text on the touchscreen and the Tesla app are the authoritative sources.
Mechanics Guide Step-by-step diagnosis
Step-by-Step Diagnostic Procedure
Read the alert text on the touchscreen exactly as shown — Tesla's own wording is more specific than any third-party list, this page included.
Check for a Tesla service bulletin or a pending software update; a number of alerts clear on their own after an over-the-air update.
If the alert persists, request service through the Tesla app. Tesla alerts are not standard OBD-II codes and a generic scan tool will not read or clear them.
Sources 1
This page is built from documented references. Verify against your own service info before repair work.
- Tesla alert dictionary (canonical firmware alert identifiers)community-maintained dictionary, not an official manufacturer document
Commonly Affected Vehicles
- Tesla Model 3 (Performance)
- Tesla Model S (Plaid)
- Tesla Model S (LR)
- Tesla Model X (Plaid)
- Tesla Model Y (Performance)
- Tesla Cybertruck (Cyberbeast)
- Tesla Cybertruck (AWD)
Related Codes
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