This content was compiled automatically and has not yet been reviewed by a technician. For reference only.
For reference only. Always confirm part numbers and procedures for your specific vehicle.
Fault diagnosis
BYD SEAL: Vehicle has no power after the low-voltage battery runs low
The vehicle has no power before use, and smart charging of the 12V (low-voltage) battery has failed.
BYD SEAL: Vehicle has no power after the low-voltage battery runs low
Symptoms
- The vehicle has no power before use, and smart charging of the 12V (low-voltage) battery has failed. [1]
Possible causes
- The manual explains that the 12V (low-voltage) battery may cut off the vehicle power supply after smart charging fails. [1]
Checks
- Check the status using this vehicle's low-voltage battery wake-up and charging instructions. Have a qualified technician inspect the connections and battery. [1]
What to do
- Follow the requirements for this version's low-voltage iron battery; do not apply lead-acid jump-starting methods or dismantle the pack yourself. [1]
Applicability and limits
- Only applies to the corresponding SEAL configuration in the New Zealand English owner's manual; the manual date is not treated as an applicable model year. No actual vehicle model has been linked. Do not extend to models with the same name, other powertrains or other markets. Scope: unknown [1]
- Only applies to the specific configuration in the cited manual; do not assume applicability to all vehicles with the same model name
Related part categories
- Low-voltage batteries / 12V (low-voltage) battery / Low-voltage power supply [1]
Sources
[Source 1] BYD SEAL Owner’s Manual NZ 11/2023 — PDF pp.94–95 / printed pp.93–94, Low-voltage Battery / Smart Charging (accessed 2026-11-01)
https://www.bydauto.co.nz/storage/uploads/584dac99-9035-4e65-9354-42c1b8162793/BYD-SEAL-OWNER%E2%80%98s-MANUAL-NZ_11_2023_web.pdf
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