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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
This light indicates the high-voltage battery temperature is too high and the vehicle must be stopped to cool down. If the light flashes, the handbook recommends immediately stopping safely and leaving the vehicle as soon as possible.
Immediate actions
- 1Immediately stop the vehicle safely.
- 2If the light is flashing, leave the vehicle as soon as it is safe to do so.
- 3Do not continue driving up long slopes or in stop-and-go conditions until checked by a professional.
- 4Contact a BYD authorized dealer or service provider.
What to check
Stop the vehicle safely as soon as possible
Leave the vehicle if the light is flashing
Do not touch or attempt to inspect the high-voltage battery yourself
Contact an authorized BYD dealer, service provider, or emergency responders if there are additional hazard signs
Possible causes
- ›Official handbook source: sustained high-load conditions such as driving up a slope for a long time in hot weather, long stop-and-go traffic, frequent rapid acceleration or hard braking, or extended driving without a pause.
Related warning lights
Sources
✓BYD Australia ATTO 2 Owner's Handbook 2025 (PDF)
For informational purposes only. Always consult a certified service center for diagnosis and repair of warning light conditions.