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BYD P268B00

DC charging negative contactor echo check fault

DriveUnknown. Whether the vehicle can be driven is not established by verified evidence.
ChargeUnknown. Whether charging can continue is not established by verified evidence.
ServiceService requirement is unknown in the supplied evidence. Because this code concerns the DC charging system, professional diagnosis is appropriate.
Confidence95%

Quick answer

P268B00 on a BYD ATTO 3 indicates a DC charging negative contactor echo check fault.

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 P268B00 mean?

P268B00 on a BYD ATTO 3 indicates a DC charging negative contactor echo check fault.

2. Technical explanation

Verified evidence identifies P268B00 as a fault in the DC-charging negative-contactor echo check. The supplied evidence does not establish the specific failed component, test conditions, or repair procedure.

3. What system is affected?

DC charging

4. How serious is this code?

Unknown. Severity is not established by verified evidence.

5. Symptoms you may notice

  • A diagnostic trouble code P268B00 may be stored.
  • Further symptoms are 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 charging can continue is not established by verified evidence.

9. What you can safely do

  • Arrange diagnosis by a qualified BYD service provider or suitably qualified EV technician.
  • Do not attempt high-voltage contactor, battery, or DC-charging-system repairs yourself.

10. Step-by-step troubleshooting

  1. Have a qualified technician retrieve and evaluate P268B00 using appropriate diagnostic equipment.
  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 DC charging system, professional diagnosis is appropriate.

12. What the service center may check

  • Confirm the presence and status of DTC P268B00.
  • Additional service checks are 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 applicability: BYD ATTO 3, model years 2022–2026, Global region. Evidence source: OBDTotal technical manual index, “BYD ATTO 3 diagnostic evidence,” locator: ATTO 3 / Yuan Plus (SC2E) / P268B00. Last verified: 2026-09-25.

19. Frequently asked questions

What does BYD code P268B00 mean?

It means “DC charging negative contactor echo check fault.”

Which vehicles are covered by the supplied evidence?

BYD ATTO 3 vehicles for model years 2022–2026 in the Global region.

Can I drive with P268B00?

Not yet established by verified evidence.

Can I charge with P268B00?

Not yet established by verified evidence.

20. Sources & verification

Verified
BYD P268B00: DC charging negative contactor echo check fault | EV Diagnostics