BYD P1AFD00
DC-DC high-voltage interlock fault
Quick answer
P1AFD00 on a BYD ATTO 3 is identified as a DC-DC high-voltage interlock 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 P1AFD00 mean?
P1AFD00 on a BYD ATTO 3 is identified as a DC-DC high-voltage interlock fault.
2. Technical explanation
Verified diagnostic evidence defines P1AFD00 as “DC-DC high-voltage interlock fault.” It is assigned to the HV system. The supplied evidence does not further define the fault logic, enabling conditions, or component-level cause.
3. What system is affected?
HV system; specifically, the diagnostic description references the DC-DC high-voltage interlock.
4. How serious is this code?
Unknown. Severity is not established by the verified evidence.
5. Symptoms you may notice
- Not yet established by verified evidence.
6. Possible causes
- A DC-DC high-voltage interlock fault is indicated by P1AFD00.
- Underlying component-level causes are not yet established by verified evidence.
7. Can I still drive the vehicle?
Unknown. Whether the vehicle can be driven with P1AFD00 is not established by verified evidence.
8. Can I charge the vehicle?
Unknown. Whether the vehicle can be charged with P1AFD00 is not established by verified evidence.
9. What you can safely do
- Arrange diagnosis by a qualified BYD service provider or technician trained to work on high-voltage systems.
- Do not attempt high-voltage interlock or DC-DC system repairs yourself.
10. Step-by-step troubleshooting
- Use appropriate diagnostic equipment to confirm P1AFD00 and assess the DC-DC high-voltage interlock fault. Detailed diagnostic steps are not established by the supplied verified evidence.
- High-voltage inspection and repair procedures are not provided because they are not established by the supplied evidence and should be performed by qualified personnel.
11. When to contact service
Service requirement status is unknown in the supplied evidence. Because this code concerns the HV system and a high-voltage interlock, professional diagnosis by a qualified BYD service provider is appropriate.
12. What the service center may check
- Confirm the presence of P1AFD00 using diagnostic equipment.
- Diagnose the DC-DC high-voltage interlock fault using applicable BYD technical information. Specific checks are 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
Verified evidence: OBDTotal technical manual index, “BYD ATTO 3 diagnostic evidence,” locator: ATTO 3 / Yuan Plus (SC2E) / P1AFD00. It identifies P1AFD00 as “DC-DC high-voltage interlock fault.” 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 P1AFD00 mean?
It means “DC-DC high-voltage interlock fault.”
Which vehicles does the supplied evidence cover?
The supplied applicability evidence covers the BYD ATTO 3, model years 2022 through 2026, Global region.
Is it safe to drive with P1AFD00?
Not yet established by verified evidence.
Can the vehicle be charged with P1AFD00?
Not yet established by verified evidence.