BYD U20B600
BIC7 CAN communication timeout
Quick answer
U20B600 is a BYD DTC meaning “BIC7 CAN communication timeout.” It is verified for specified BYD ATTO 3, DOLPHIN, and HAN applications.
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 U20B600 mean?
U20B600 is a BYD DTC meaning “BIC7 CAN communication timeout.” It is verified for specified BYD ATTO 3, DOLPHIN, and HAN applications.
2. Technical explanation
The verified diagnostic meaning is a CAN communication timeout involving BIC7. The supplied evidence does not establish the underlying fault cause, diagnostic procedure, or repair method.
3. What system is affected?
HV battery/network
4. How serious is this code?
Unknown. Verified evidence does not assign a severity level.
5. Symptoms you may notice
- Not yet established by verified evidence.
6. Possible causes
- Not yet established by verified evidence.
7. Can I still drive the vehicle?
Unknown. Verified evidence does not establish whether driving is safe with U20B600 present.
8. Can I charge the vehicle?
Unknown. Verified evidence does not establish whether charging is safe with U20B600 present.
9. What you can safely do
- Arrange professional diagnosis by a qualified BYD service provider.
- Do not attempt high-voltage battery or network repairs based on this code alone.
10. Step-by-step troubleshooting
- A verified troubleshooting procedure is not supplied in the available evidence.
- A service provider should use applicable BYD diagnostic information to evaluate U20B600.
11. When to contact service
Service need is unknown in the supplied record; however, professional diagnosis is appropriate because this DTC concerns the HV battery/network system.
12. What the service center may check
- 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
- BYD DOLPHIN · 2021–2026 · GLOBAL
- BYD HAN · 2023 · 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 technical-manual-index evidence identifies U20B600 as “BIC7 CAN communication timeout” for BYD ATTO 3, BYD DOLPHIN, and BYD HAN applications listed below. No BYD manufacturer-issued repair procedure, recall, or bulletin was supplied.
- 17VIN technical manual index: BYD DOLPHIN diagnostic evidence · technical_manual
- 17VIN technical manual index: BYD HAN diagnostic evidence · technical_manual
- OBDTotal technical manual index: BYD ATTO 3 diagnostic evidence · technical_manual
19. Frequently asked questions
What does BYD code U20B600 mean?
It means “BIC7 CAN communication timeout.”
Which vehicles are verified to use U20B600?
BYD ATTO 3 model years 2022–2026 (Global), BYD DOLPHIN model years 2021–2026 (Global), and BYD HAN model year 2023 (Global).
Can I drive with U20B600?
Not yet established by verified evidence.
Can I charge with U20B600?
Not yet established by verified evidence.
What repairs fix U20B600?
Not yet established by verified evidence.