BYD B222400
Sunroof Hall sensor signal abnormal
Quick answer
B222400 is a BYD ATTO 3 sunroof diagnostic trouble code meaning: “Sunroof Hall sensor signal abnormal.” Verified applicability: 2022–2026 ATTO 3 (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 B222400 mean?
B222400 is a BYD ATTO 3 sunroof diagnostic trouble code meaning: “Sunroof Hall sensor signal abnormal.” Verified applicability: 2022–2026 ATTO 3 (Global).
2. Technical explanation
The verified diagnostic evidence identifies B222400 as a Sunroof-system DTC for an abnormal sunroof Hall sensor signal. The available evidence does not establish the exact failure mechanism, test procedure, or repair method.
3. What system is affected?
Sunroof
4. How serious is this code?
Unknown. Severity is not yet established by verified evidence.
5. Symptoms you may notice
- Not yet established by verified evidence.
6. Possible causes
- An abnormal sunroof Hall sensor signal is identified by the DTC meaning. The underlying cause is not yet established by verified evidence.
7. Can I still drive the vehicle?
Unknown. Safe-to-drive status is not yet established by verified evidence.
8. Can I charge the vehicle?
Unknown. Safe-to-charge status is not yet established by verified evidence.
9. What you can safely do
- Arrange diagnosis by a qualified BYD service provider if the code is present.
- Do not attempt high-voltage or unsupported repair procedures. No specific owner repair action is established by verified evidence.
10. Step-by-step troubleshooting
- Confirm the stored DTC is B222400 using suitable diagnostic equipment.
- Further troubleshooting steps are not yet established by verified evidence.
11. When to contact service
Service requirement is unknown in the verified record. Contact a BYD service provider for diagnosis if B222400 is stored or the sunroof is not operating normally.
12. What the service center may check
- Verify DTC B222400 and assess the sunroof system using manufacturer-appropriate diagnostic procedures. Specific checks are not yet established by verified evidence.
13. Possible repair or resolution
- Not yet established by verified evidence.
14. Affected vehicles
- BYD ATTO 3 · 2022–2026 · GLOBAL
15. Related TSBs / service bulletins
- Not yet established by verified evidence.
16. Recall information
- Not yet established by verified evidence.
17. Official manufacturer information
Verified source: OBDTotal technical manual index, “BYD ATTO 3 diagnostic evidence,” locator: ATTO 3 / Yuan Plus (SC2E) / B222400. The evidence states: “Sunroof Hall sensor signal abnormal.”
- OBDTotal technical manual index: BYD ATTO 3 diagnostic evidence · technical_manual
19. Frequently asked questions
What does BYD code B222400 mean?
It means “Sunroof Hall sensor signal abnormal.”
Which vehicles are verified as applicable?
BYD ATTO 3 model years 2022–2026, Global region.
Is it safe to drive or charge with B222400?
Safe-to-drive and safe-to-charge status are not yet established by verified evidence.
What repair fixes B222400?
A specific repair resolution is not yet established by verified evidence.