BYD B1C1200
Left rear door lock fault
Quick answer
B1C1200 is a BYD body-control DTC identified as “Left rear door lock fault.” Verified applicability is the 2024 BYD SEALION 7 (global).
This page separates verified manufacturer/regulator evidence from supporting material. Unsupported causes, repairs or safety conclusions are not guessed.
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1. What does B1C1200 mean?
B1C1200 is a BYD body-control DTC identified as “Left rear door lock fault.” Verified applicability is the 2024 BYD SEALION 7 (global).
2. Technical explanation
The verified technical-manual evidence defines B1C1200 as a fault involving the left rear door lock. No further fault logic, test criteria, wiring detail, or component-level root cause is established by the supplied evidence.
3. What system is affected?
Body control; left rear door lock.
4. How serious is this code?
Unknown. Severity has not yet been established by verified evidence.
5. Symptoms you may notice
- A left rear door lock fault is indicated by DTC B1C1200.
- Additional symptoms have not yet been 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 B1C1200 has not yet been established by verified evidence.
8. Can I charge the vehicle?
Unknown. Whether the vehicle can be charged with B1C1200 has not yet been established by verified evidence.
9. What you can safely do
- Do not assume the left rear door lock will operate normally while this DTC is present.
- Arrange diagnosis by a qualified BYD service provider or suitably trained automotive technician.
10. Step-by-step troubleshooting
- Confirm the stored DTC using an appropriate diagnostic scan tool.
- Further diagnostic procedure has not yet been established by verified evidence.
11. When to contact service
Service requirement has not yet been established by verified evidence. Because this code concerns a door-lock function, seek professional diagnosis if the fault is present or the lock operation is abnormal.
12. What the service center may check
- Retrieve and document B1C1200 with a compatible diagnostic tool.
- Inspect and test procedures beyond code confirmation have not yet been 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 in the verified evidence.
16. Recall information
- No recall information was supplied in the verified evidence.
17. Official manufacturer information
Verified source: 17VIN technical manual index, “BYD SEALION 7 diagnostic evidence,” locator: “SEALION 7 | Sealion 07 EV / 2024 | B1C1200.” The source identifies the code as “Left rear door lock fault.”
- 17VIN technical manual index: BYD SEALION 7 diagnostic evidence · technical_manual
19. Frequently asked questions
What does BYD code B1C1200 mean?
For the verified 2024 BYD SEALION 7 global applicability, B1C1200 means “Left rear door lock fault.”
Which system is associated with B1C1200?
The supplied diagnostic record assigns B1C1200 to the Body control system.
Can I drive with B1C1200?
Not yet established by verified evidence.
Can I charge with B1C1200?
Not yet established by verified evidence.
What causes B1C1200?
Not yet established by verified evidence.