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Red lightCritical
High-voltage battery fault warning light
Service requiredSafety warning — do not ignore this light
This warning light indicates a potentially serious fault. Do not continue driving. Stop in a safe location and contact an authorized service center or roadside assistance. Never attempt to inspect high-voltage or safety-critical components yourself.
What this light means
This light comes on at startup for self-check and should go out if the power battery system works properly. If it stays on or comes on while driving, BYD inspection is recommended as soon as possible.
Immediate actions
- 1Do not attempt HV battery inspection yourself.
- 2Avoid unnecessary driving if the light stays on.
- 3Contact a BYD authorized dealer or service provider as soon as possible.
What to check
Record exact icon/message, driving or charging state and recent conditions
Follow the owner handbook escalation for the warning severity
Do not repair HV, brake, steering, airbag, ADAS, fuel or wiring systems yourself
Possible causes
- ›Official SEALION 5 owner handbook warning-light/dashboard-message chapter.
- ›Exact root cause requires BYD diagnostic inspection; no DTC code is published from this summary.
Related warning lights
Sources
✓BYD New Zealand SEALION 5 owner handbook PDF
For informational purposes only. Always consult a certified service center for diagnosis and repair of warning light conditions.