High-voltage battery fault warning light

Stop soon

Safety 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 when the ignition is switched on and normally turns off within a few seconds if the high-voltage battery system is working properly. If the system develops a fault, the light turns on again and stays on.

Immediate actions

1Avoid demanding driving (hard acceleration, high speed) until the vehicle is checked.
2Contact a BYD authorized dealer or service provider for inspection as soon as possible.

What to check

Note when the light came on (start-up, during driving, during/after charging)

Avoid demanding acceleration or towing until checked

Book an inspection with an authorized BYD dealer or service provider as soon as possible

Possible causes

›Official handbook source: a component monitored by the high-voltage battery fault warning-light system has developed an issue.

Related warning lights

ABS fault warning light ESC (electronic stability control) fault warning light Steering system fault warning light Tire pressure fault warning light (TPMS)

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.