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Red lightCritical
High-voltage battery fault warning
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
HV battery system fault after self-check or during driving.
Immediate actions
- 1Contact BYD service; do not inspect or repair HV components.
- 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
- ›HV battery system fault
- ›battery management issue
- ›high-voltage component 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.