BYD P1BC300
Front drive motor phase B lost
Quick answer
P1BC300 means “Front drive motor phase B lost” on applicable BYD ATTO 3 vehicles. The supplied evidence identifies the fault meaning only; driving, charging, severity, symptoms, causes, and repair actions are not yet established by verified evidence.
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 P1BC300 mean?
P1BC300 means “Front drive motor phase B lost” on applicable BYD ATTO 3 vehicles. The supplied evidence identifies the fault meaning only; driving, charging, severity, symptoms, causes, and repair actions are not yet established by verified evidence.
2. Technical explanation
P1BC300 is a BYD drive-motor diagnostic trouble code. Verified technical-manual evidence defines it as: “Front drive motor phase B lost.” This indicates the code concerns the front drive motor system, specifically phase B. The supplied evidence does not define the monitoring conditions, failure criteria, electrical fault path, or required repair procedure.
3. What system is affected?
Drive motor — front drive motor, phase B.
4. How serious is this code?
Unknown. 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. A diagnostic identifier alone is not proof that a specific component has failed.
7. Can I still drive the vehicle?
Unknown. Not yet established by verified evidence.
8. Can I charge the vehicle?
Unknown. Not yet established by verified evidence.
9. What you can safely do
- Arrange diagnosis by a qualified BYD service provider or appropriately trained EV technician.
- Do not attempt high-voltage drive-motor diagnosis or repair based on this code alone.
10. Step-by-step troubleshooting
- Confirm the stored DTC and obtain the vehicle’s associated diagnostic information using appropriate BYD diagnostic equipment.
- Further troubleshooting 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 drive motor, seek assessment from a qualified BYD service provider or appropriately trained EV technician.
12. What the service center may check
- Verify P1BC300 and review associated diagnostic information.
- Additional service checks are not yet established by verified evidence.
13. Possible repair or resolution
- A verified repair resolution is not yet established by the supplied evidence.
14. Affected vehicles
- BYD ATTO 3 · 2022–2026 · GLOBAL
15. Related TSBs / service bulletins
No related TSB or service-bulletin relationship is established by verified evidence.
16. Recall information
No recall relationship is established by verified evidence.
17. Official manufacturer information
Verified evidence source: OBDTotal technical manual index, “BYD ATTO 3 diagnostic evidence,” locator: ATTO 3 / Yuan Plus (SC2E) / P1BC300. The source identifies P1BC300 as “Front drive motor phase B lost.”
- OBDTotal technical manual index: BYD ATTO 3 diagnostic evidence · technical_manual
19. Frequently asked questions
What does BYD code P1BC300 mean?
Verified evidence defines P1BC300 as “Front drive motor phase B lost.”
Which vehicles are covered by the supplied evidence?
The supplied applicability evidence covers BYD ATTO 3 model years 2022 through 2026 in the GLOBAL region.
Can I drive with P1BC300?
Not yet established by verified evidence.
Can I charge with P1BC300?
Not yet established by verified evidence.
What causes P1BC300?
Not yet established by verified evidence.