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BYD C110009

EPB control module main chip fault

DriveUnknown. The verified record does not establish whether the vehicle is safe to drive with C110009 present.
ChargeUnknown. The verified record does not establish whether charging is affected or safe with C110009 present.
ServiceService requirement is not established by the supplied evidence. Because the DTC concerns the EPB control module, seek qualified diagnosis if the code is present.
Confidence95%

Quick answer

For BYD ATTO 3 vehicles (2022–2026, Global), DTC C110009 means: “EPB control module main chip 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 C110009 mean?

For BYD ATTO 3 vehicles (2022–2026, Global), DTC C110009 means: “EPB control module main chip fault.”

2. Technical explanation

Verified diagnostic evidence identifies C110009 as an electronic parking brake (EPB) control module main-chip fault. The supplied evidence does not establish the specific failure mechanism, test procedure, wiring involvement, or repair method.

3. What system is affected?

Electronic Parking Brake (EPB) control module.

4. How serious is this code?

Unknown. The verified record does not assign a severity.

5. Symptoms you may notice

  • Not yet established by verified evidence.

6. Possible causes

  • EPB control module main chip fault.

7. Can I still drive the vehicle?

Unknown. The verified record does not establish whether the vehicle is safe to drive with C110009 present.

8. Can I charge the vehicle?

Unknown. The verified record does not establish whether charging is affected or safe with C110009 present.

9. What you can safely do

  • Arrange diagnosis by a qualified BYD service provider or suitably trained technician.
  • Do not attempt high-voltage repairs; no high-voltage repair procedure is established by the supplied evidence.

10. Step-by-step troubleshooting

  1. Not yet established by verified evidence.

11. When to contact service

Service requirement is not established by the supplied evidence. Because the DTC concerns the EPB control module, seek qualified diagnosis if the code is present.

12. What the service center may check

  • Confirm the stored DTC and evaluate the EPB system using appropriate diagnostic equipment. Further specific checks are not established by verified evidence.

13. Possible repair or resolution

  • Not yet established by verified evidence.

14. Affected vehicles

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 source: OBDTotal technical manual index, “BYD ATTO 3 diagnostic evidence,” locator: ATTO 3 / Yuan Plus (SC2E) / C110009. The supplied source applies this evidence to BYD ATTO 3 model years 2022–2026 in the Global region.

19. Frequently asked questions

What does BYD code C110009 mean?

It means “EPB control module main chip fault.”

Which vehicles are covered by the supplied evidence?

BYD ATTO 3 vehicles, model years 2022 through 2026, Global region.

Can I drive with C110009?

Not yet established by verified evidence.

Does C110009 affect charging?

Not yet established by verified evidence.

What repair fixes C110009?

Not yet established by verified evidence.

20. Sources & verification

Verified
BYD C110009: EPB control module main chip fault | EV Diagnostics