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BYD U20B200

BIC3 CAN communication timeout

DriveUnknown. Whether the vehicle can be driven is not established by verified evidence.
ChargeUnknown. Whether the vehicle can be charged is not established by verified evidence.
ServiceService requirement is unknown in the supplied evidence. Because this code concerns the HV battery/network system, arrange assessment by a qualified BYD service provider or appropriately trained EV technician.
Confidence95%

Quick answer

U20B200 is identified as “BIC3 CAN communication timeout” in the HV battery/network system for specified BYD vehicles.

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 U20B200 mean?

U20B200 is identified as “BIC3 CAN communication timeout” in the HV battery/network system for specified BYD vehicles.

2. Technical explanation

Verified diagnostic evidence defines DTC U20B200 as a BIC3 CAN communication timeout. This indicates that the diagnostic system recorded a CAN-network communication timeout involving BIC3. The supplied evidence does not establish the underlying fault cause, operating conditions, or repair procedure.

3. What system is affected?

HV battery/network

4. How serious is this code?

Unknown. Severity is not established by the 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 is not established by verified evidence.

8. Can I charge the vehicle?

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

9. What you can safely do

  • Do not attempt high-voltage battery or network repairs based on this code alone.
  • Have the code assessed using appropriate BYD diagnostic information and qualified service procedures.

10. Step-by-step troubleshooting

  1. Confirm the stored DTC and record any accompanying diagnostic information.
  2. Further diagnostic steps are not yet established by verified evidence.

11. When to contact service

Service requirement is unknown in the supplied evidence. Because this code concerns the HV battery/network system, arrange assessment by a qualified BYD service provider or appropriately trained EV technician.

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 bulletins were supplied as verified evidence.

16. Recall information

  • No recalls were supplied as verified evidence.

17. Official manufacturer information

Verified evidence is from technical-manual indexes: OBDTotal for BYD ATTO 3/Yuan Plus (SC2E), and 17VIN for BYD DOLPHIN and BYD HAN. These sources identify U20B200 as “BIC3 CAN communication timeout.”

19. Frequently asked questions

What does BYD code U20B200 mean?

It means “BIC3 CAN communication timeout,” according to the supplied verified diagnostic evidence.

Which system is associated with U20B200?

The supplied diagnostic record associates it with the HV battery/network system.

Can I drive or charge with U20B200?

Not yet established by verified evidence. Driveability and charging status are listed as unknown.

What repairs fix U20B200?

Not yet established by verified evidence. No verified repair procedure was supplied.

20. Sources & verification

Verified
BYD U20B200: BIC3 CAN communication timeout | EV Diagnostics