⚠
Red lightCritical
High-voltage battery overheating warning
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
High-voltage battery temperature is too high; flashing warning requires immediate safe stop and leaving the vehicle.
Immediate actions
- 1Stop safely, let the vehicle cool, leave the vehicle if flashing, and contact BYD service.
- 2Record exact dashboard message, speed, SOC, charging state and conditions.
- 3Do not dismantle the system; contact authorized BYD service.
What to check
Confirm exact dashboard message
Stop safely for red/critical warnings
Confirm VIN, market and software with dealer
Possible causes
- ›long uphill driving in heat
- ›stop-go traffic
- ›rapid acceleration/braking
- ›thermal fault
Related warning lights
Sources
✓BYD SEALION 7 owners manual LHD EN 240820
For informational purposes only. Always consult a certified service center for diagnosis and repair of warning light conditions.