BYD C1B9000
EPS power loss
Quick answer
For the BYD ATTO 3 (2022–2026, Global), DTC C1B9000 is identified as “EPS power loss.”
This page separates verified manufacturer/regulator evidence from supporting material. Unsupported causes, repairs or safety conclusions are not guessed.
Watch Videos
Relevant videos play here without leaving this diagnostic page.
No sufficiently relevant embeddable video has been accepted for this diagnostic yet.
Videos are supporting material and never override OEM or regulator evidence.
1. What does C1B9000 mean?
For the BYD ATTO 3 (2022–2026, Global), DTC C1B9000 is identified as “EPS power loss.”
2. Technical explanation
Verified evidence identifies C1B9000 as an Electric Power Steering (EPS) diagnostic trouble code for EPS power loss. The supplied evidence does not further define the triggering conditions, root cause, or diagnostic procedure.
3. What system is affected?
Steering/EPS
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. A diagnostic identifier alone is not proof that a specific component has failed.
7. Can I still drive the vehicle?
Not yet established by verified evidence.
8. Can I charge the vehicle?
Not yet established by verified evidence.
9. What you can safely do
- Avoid attempting high-voltage or EPS system repairs without qualified service support.
- Record the DTC C1B9000 and provide it to a qualified BYD service provider.
10. Step-by-step troubleshooting
- No vehicle-specific troubleshooting steps are established by the supplied verified evidence.
11. When to contact service
Service requirement is not established by verified evidence. A qualified BYD service provider can assess DTC C1B9000 and the EPS 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
15. Related TSBs / service bulletins
- Not yet established by verified evidence.
16. Recall information
- Not yet established by verified evidence.
17. Official manufacturer information
The supplied technical-manual evidence is indexed by OBDTotal and identifies BYD ATTO 3 / Yuan Plus (SC2E) DTC C1B9000 as “EPS power loss.” No OEM bulletin, recall, or further official diagnostic information was supplied.
- OBDTotal technical manual index: BYD ATTO 3 diagnostic evidence · technical_manual
19. Frequently asked questions
What does BYD code C1B9000 mean?
For the BYD ATTO 3 / Yuan Plus (SC2E), verified evidence identifies C1B9000 as EPS power loss.
Which vehicles are covered by the supplied evidence?
The supplied applicability evidence covers the BYD ATTO 3, model years 2022 through 2026, Global region.
Is it safe to drive with C1B9000?
Not yet established by verified evidence.
What causes C1B9000?
Not yet established by verified evidence.