BYD B1CE400
Sunlight sensor fault
Quick answer
For the 2024 BYD SEALION 7, DTC B1CE400 is identified as a sunlight sensor fault.
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 B1CE400 mean?
For the 2024 BYD SEALION 7, DTC B1CE400 is identified as a sunlight sensor fault.
2. Technical explanation
Verified technical-manual evidence identifies B1CE400 as “Sunlight sensor fault.” The supplied evidence does not describe the fault-detection conditions, sensor location, circuit details, diagnostic steps, or repair procedure.
3. What system is affected?
Body sensor system.
4. How serious is this code?
Unknown. The diagnostic record does not assign a severity level.
5. Symptoms you may notice
- Not yet established by verified evidence.
6. Possible causes
- A fault associated with the sunlight sensor is indicated by the DTC definition. Specific causes are not yet established by verified evidence.
7. Can I still drive the vehicle?
Unknown. Verified evidence does not state whether the vehicle is safe to drive with B1CE400 present.
8. Can I charge the vehicle?
Unknown. Verified evidence does not state whether the vehicle is safe to charge with B1CE400 present.
9. What you can safely do
- Record the DTC and any warning messages or unusual vehicle behavior.
- Arrange diagnosis by a qualified BYD service provider or appropriately trained technician.
- Do not attempt high-voltage-system repairs based on this code; the supplied evidence does not link B1CE400 to a high-voltage repair procedure.
10. Step-by-step troubleshooting
- Use approved diagnostic information and equipment to confirm B1CE400 and inspect the sunlight-sensor system according to manufacturer procedures. Detailed test steps are not yet established by verified evidence.
11. When to contact service
Service requirement is unknown in the supplied diagnostic record. If the code remains stored, obtain professional diagnosis using approved BYD service information.
12. What the service center may check
- Confirm DTC B1CE400 with approved diagnostic equipment.
- Follow manufacturer diagnostic procedures for the sunlight sensor system. Specific checks 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 bulletins were supplied as verified evidence for B1CE400.
16. Recall information
- No recalls were supplied as verified evidence for B1CE400.
17. Official manufacturer information
Verified source: 17VIN technical manual index, “BYD SEALION 7 diagnostic evidence,” locator: “SEALION 7 | Sealion 07 EV / 2024 | B1CE400.” It identifies the code as “Sunlight sensor fault.”
- 17VIN technical manual index: BYD SEALION 7 diagnostic evidence · technical_manual
19. Frequently asked questions
What does BYD code B1CE400 mean?
For the applicable vehicle evidence, B1CE400 means “Sunlight sensor fault.”
Which vehicle is verified as applicable?
The supplied applicability evidence covers the 2024 BYD SEALION 7 in the GLOBAL region.
Can I drive with B1CE400?
Not yet established by verified evidence.
Can I charge with B1CE400?
Not yet established by verified evidence.