BYD P1BC400
Front drive motor phase C lost
Quick answer
For the BYD ATTO 3 (2022–2026, Global), DTC P1BC400 means: Front drive motor phase C lost.
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 P1BC400 mean?
For the BYD ATTO 3 (2022–2026, Global), DTC P1BC400 means: Front drive motor phase C lost.
2. Technical explanation
Verified diagnostic evidence identifies P1BC400 as a Drive motor system fault meaning “Front drive motor phase C lost.” The supplied evidence does not provide further technical operating conditions, detection criteria, or component-level diagnosis.
3. What system is affected?
Drive motor — front drive motor phase C.
4. How serious is this code?
Not yet 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?
Not yet established by verified evidence.
8. Can I charge the vehicle?
Not yet established by verified evidence.
9. What you can safely do
- Do not attempt high-voltage diagnosis or repair based on this code alone.
- Have the vehicle assessed by qualified EV service personnel.
10. Step-by-step troubleshooting
- Confirm the stored diagnostic trouble code with suitable diagnostic equipment.
- Further troubleshooting steps are not yet established by verified evidence.
11. When to contact service
Service requirements are not yet established by verified evidence. Because this code concerns the drive motor system, qualified EV service assessment is appropriate.
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
- No technical service bulletins were supplied in the verified evidence.
16. Recall information
- No recalls were supplied in the verified evidence.
17. Official manufacturer information
Verified evidence source: OBDTotal technical manual index, “BYD ATTO 3 diagnostic evidence,” locator: ATTO 3 / Yuan Plus (SC2E) / P1BC400. Applicability supplied: BYD ATTO 3, model years 2022–2026, Global.
- OBDTotal technical manual index: BYD ATTO 3 diagnostic evidence · technical_manual
19. Frequently asked questions
What does BYD code P1BC400 mean?
For the BYD ATTO 3, P1BC400 means “Front drive motor phase C lost.”
Which vehicle is P1BC400 verified for?
The supplied evidence verifies applicability to the BYD ATTO 3, model years 2022 through 2026, Global region.
Can I drive with P1BC400?
Not yet established by verified evidence.
Can I charge with P1BC400?
Not yet established by verified evidence.