BYD B229D16
High-frequency receiver module undersupply
Quick answer
B229D16 is a BYD Smart key diagnostic trouble code meaning “High-frequency receiver module undersupply.” Verified applicability: BYD ATTO 3, model years 2022–2026, Global market.
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 B229D16 mean?
B229D16 is a BYD Smart key diagnostic trouble code meaning “High-frequency receiver module undersupply.” Verified applicability: BYD ATTO 3, model years 2022–2026, Global market.
2. Technical explanation
The verified diagnostic evidence identifies B229D16 as an undersupply condition affecting the high-frequency receiver module within the Smart key system. The available evidence does not establish the voltage source, wiring path, enabling conditions, failure criteria, or a specific repair procedure.
3. What system is affected?
Smart key system; high-frequency receiver module.
4. How serious is this code?
Unknown. Severity has not yet been established by verified evidence.
5. Symptoms you may notice
Not yet established by verified evidence.
6. Possible causes
- A supply-related condition at the high-frequency receiver module is indicated by the code meaning. The underlying cause is not yet established by verified evidence.
7. Can I still drive the vehicle?
Unknown. Whether the vehicle can be driven with B229D16 has not yet been established by verified evidence.
8. Can I charge the vehicle?
Unknown. Whether the vehicle can be charged with B229D16 has not yet been established by verified evidence.
9. What you can safely do
- Record the DTC and any accompanying warning messages or smart-key operating concerns.
- Arrange diagnosis by a qualified BYD service provider or appropriately trained technician.
- Do not attempt high-voltage system repairs based on this code.
10. Step-by-step troubleshooting
- Use suitable diagnostic equipment to confirm B229D16 and check for any accompanying DTCs. Further test steps are not yet established by verified evidence.
- A qualified technician should follow applicable BYD diagnostic information for the Smart key system and high-frequency receiver module.
11. When to contact service
Service need is unknown in the supplied evidence. If the code is present or smart-key operation is affected, contact a BYD service provider for diagnosis.
12. What the service center may check
- Confirm B229D16 is current or stored and document accompanying DTCs.
- Inspect and test according to applicable BYD service information. Specific checks are not yet established by verified evidence.
13. Possible repair or resolution
- A verified repair resolution is not yet established by the supplied evidence.
14. Affected vehicles
- BYD ATTO 3 · 2022–2026 · GLOBAL
15. Related TSBs / service bulletins
- No technical service bulletin information was supplied or verified for B229D16.
16. Recall information
- No recall information was supplied or verified for B229D16.
17. Official manufacturer information
Verified source: OBDTotal technical manual index, “BYD ATTO 3 diagnostic evidence,” locator: ATTO 3 / Yuan Plus (SC2E) / B229D16. The source identifies the code meaning as “High-frequency receiver module undersupply.”
- OBDTotal technical manual index: BYD ATTO 3 diagnostic evidence · technical_manual
19. Frequently asked questions
What does BYD code B229D16 mean?
It means “High-frequency receiver module undersupply” in the Smart key system.
Which vehicles are verified as applicable?
BYD ATTO 3 vehicles for model years 2022 through 2026 in the Global region.
Is it safe to drive or charge with B229D16?
That has not yet been established by verified evidence.