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BYD U20B500

BIC6 CAN communication timeout

DriveUnknown. Whether the vehicle can be driven with U20B500 is not established by verified evidence.
ChargeUnknown. Whether the vehicle can be charged with U20B500 is not established by verified evidence.
ServiceContact a qualified BYD service provider for diagnosis, particularly because this code is identified under the HV battery/network system. Urgency is not established by verified evidence.
Confidence95%

Quick answer

U20B500 is a BYD diagnostic trouble code meaning “BIC6 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 U20B500 mean?

U20B500 is a BYD diagnostic trouble code meaning “BIC6 CAN communication timeout.” It is verified for specified BYD ATTO 3, DOLPHIN, and HAN applications.

2. Technical explanation

The verified evidence identifies U20B500 as a CAN communication timeout involving BIC6. The supplied evidence does not define BIC6 further, identify the timeout conditions, or provide a diagnostic procedure.

3. What system is affected?

HV battery/network

4. How serious is this code?

Unknown. Severity is not established by verified evidence.

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. Whether the vehicle can be driven with U20B500 is not established by verified evidence.

8. Can I charge the vehicle?

Unknown. Whether the vehicle can be charged with U20B500 is not established by verified evidence.

9. What you can safely do

  • Do not perform high-voltage battery or network repairs unless you are appropriately trained and equipped.
  • Arrange professional diagnosis if the code is present; service requirement is not established by the supplied verified evidence.

10. Step-by-step troubleshooting

  1. A verified troubleshooting procedure for U20B500 was not supplied.
  2. A qualified BYD service provider can diagnose the reported BIC6 CAN communication timeout using applicable vehicle service information.

11. When to contact service

Contact a qualified BYD service provider for diagnosis, particularly because this code is identified under the HV battery/network system. Urgency is not established by verified evidence.

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

15. Related TSBs / service bulletins

  • No technical service bulletin information was supplied or established by verified evidence.

16. Recall information

  • No recall information was supplied or established by verified evidence.

17. Official manufacturer information

Verified technical-manual-index evidence lists U20B500 as “BIC6 CAN communication timeout” for BYD ATTO 3 / Yuan Plus (SC2E), BYD DOLPHIN 2021 family, and BYD HAN 2023 Champion/Supreme family. Sources: OBDTotal technical manual index and 17VIN technical manual index.

19. Frequently asked questions

What does BYD code U20B500 mean?

Verified evidence defines U20B500 as “BIC6 CAN communication timeout.”

Which vehicles are covered by the supplied evidence?

BYD ATTO 3 model years 2022–2026 globally, BYD DOLPHIN model years 2021–2026 globally, and BYD HAN model year 2023 globally.

Is it safe to drive or charge with U20B500?

Not yet established by verified evidence.

20. Sources & verification

Verified
BYD U20B500: BIC6 CAN communication timeout | EV Diagnostics