BYD B1C2A00
Keyless verification failure
Quick answer
BYD DTC B1C2A00 means “Keyless verification failure.” Verified applicability: 2024 BYD SEALION 7, Global market.
This page separates verified manufacturer/regulator evidence from supporting material. Unsupported causes, repairs or safety conclusions are not guessed.
Watch Videos
Relevant videos play here without leaving this diagnostic page.
No sufficiently relevant embeddable video has been accepted for this diagnostic yet.
Videos are supporting material and never override OEM or regulator evidence.
1. What does B1C2A00 mean?
BYD DTC B1C2A00 means “Keyless verification failure.” Verified applicability: 2024 BYD SEALION 7, Global market.
2. Technical explanation
The verified technical-manual evidence identifies B1C2A00 as a keyless verification failure in the Access/anti-theft system. The supplied evidence does not establish the specific failed component, triggering conditions, diagnostic procedure, or repair.
3. What system is affected?
Access/anti-theft system.
4. How serious is this code?
Unknown. Severity is not established by verified evidence.
5. Symptoms you may notice
- Keyless verification failure is indicated by DTC B1C2A00.
- Additional driver-visible symptoms are not yet established by verified evidence.
6. Possible causes
- Not yet established by verified evidence.
7. Can I still drive the vehicle?
Unknown. Whether the vehicle can be driven with B1C2A00 is not established by verified evidence.
8. Can I charge the vehicle?
Unknown. Whether the vehicle can be charged with B1C2A00 is not established by verified evidence.
9. What you can safely do
- Record the stored code B1C2A00 and the circumstances in which it was detected.
- Use a qualified BYD service provider for diagnosis if assistance is needed.
- Do not attempt high-voltage-system repairs; no high-voltage fault or repair procedure is established by the supplied evidence.
10. Step-by-step troubleshooting
- Confirm the reported DTC is B1C2A00.
- Have a qualified service provider diagnose the Access/anti-theft system. Further troubleshooting steps are not yet established by verified evidence.
11. When to contact service
Service requirement is unknown in the supplied evidence. Contact a qualified BYD service provider for diagnosis, particularly if vehicle access, authorization, or starting behavior is affected.
12. What the service center may check
- Read and confirm DTC B1C2A00.
- Diagnose the Access/anti-theft system. Specific inspection steps are not yet established by verified evidence.
13. Possible repair or resolution
- Not yet established by verified evidence.
14. Affected vehicles
- BYD SEALION 7 · 2024 · GLOBAL
15. Related TSBs / service bulletins
- No technical service bulletin information was supplied or verified.
16. Recall information
- No recall information was supplied or verified.
17. Official manufacturer information
Verified source: 17VIN technical manual index, “BYD SEALION 7 diagnostic evidence,” locator: “SEALION 7 | Sealion 07 EV / 2024 | B1C2A00.” Source URL: https://en.17vin.com/automotive_repair_manual_wiring_diagrams/BYD/2122.html. Last verified: 2026-09-25 14:49:16 UTC.
- 17VIN technical manual index: BYD SEALION 7 diagnostic evidence · technical_manual
19. Frequently asked questions
What does BYD code B1C2A00 mean?
It means “Keyless verification failure.”
Which vehicles are verified for B1C2A00?
The supplied evidence verifies applicability to the 2024 BYD SEALION 7 in the Global region.
Is it safe to drive or charge with B1C2A00?
This is not yet established by verified evidence.
What causes B1C2A00?
The cause is not yet established by verified evidence.