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Red lightCritical
High-voltage battery overheating warning light
Stop immediatelySafety 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
If this indicator is on, the high-voltage battery is too hot. If it flashes, the handbook says to stop immediately and leave the vehicle as soon as possible.
Immediate actions
- 1Stop the vehicle immediately in a safe place.
- 2Let the vehicle cool down; if the indicator flashes, leave the vehicle as soon as possible.
- 3Contact BYD emergency/service support.
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.