BYD P1A0D00
BIC2 voltage sampling abnormal
Quick answer
BYD DTC P1A0D00 means “BIC2 voltage sampling abnormal” in the HV battery system.
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 P1A0D00 mean?
BYD DTC P1A0D00 means “BIC2 voltage sampling abnormal” in the HV battery system.
2. Technical explanation
Verified evidence identifies P1A0D00 as an HV-battery diagnostic trouble code for abnormal voltage sampling by BIC2. The supplied evidence does not define BIC2 further, provide fault thresholds, or establish a specific failed component, root cause, test procedure, or repair.
3. What system is affected?
HV battery
4. How serious is this code?
Unknown. Severity has not been 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?
Unknown. Whether the vehicle can be driven has not been established by verified evidence.
8. Can I charge the vehicle?
Unknown. Whether the vehicle can be charged has not been established by verified evidence.
9. What you can safely do
- Do not attempt high-voltage battery diagnosis or repair yourself.
- Arrange assessment by a qualified BYD service provider or EV technician.
10. Step-by-step troubleshooting
- Have a qualified technician retrieve and evaluate P1A0D00 using appropriate diagnostic equipment.
- Not yet established by verified evidence: diagnostic steps, measurements, fault thresholds, and component-level tests.
11. When to contact service
Service requirement has not been established by verified evidence. Because this code concerns the HV battery system, qualified professional assessment is appropriate.
12. What the service center may check
- Confirm the stored DTC and review associated diagnostic information.
- Not yet established by verified evidence: specific service checks, wiring checks, battery measurements, or BIC2 test procedures.
13. Possible repair or resolution
- Not yet established by verified evidence.
14. Affected vehicles
- BYD ATTO 3 · 2022–2026 · GLOBAL
- BYD DOLPHIN · 2021–2026 · GLOBAL
- BYD HAN · 2023 · 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 technical-manual-index evidence lists P1A0D00 as “BIC2 voltage sampling abnormal” for the applicable BYD vehicles. Sources: OBDTotal technical manual index, ATTO 3 / Yuan Plus (SC2E), https://obdtotal.com/product/byd-atto3-yuanplus-sc2e-service-manual/; 17VIN technical manual index, DOLPHIN 2021 family, https://en.17vin.com/automotive_repair_manual_wiring_diagrams/BYD/2123.html; 17VIN technical manual index, HAN 2023 Champion/Supreme family, https://en.17vin.com/automotive_repair_manual_wiring_diagrams/BYD/2120.html. Verified 2026-09-25.
- 17VIN technical manual index: BYD DOLPHIN diagnostic evidence · technical_manual
- 17VIN technical manual index: BYD HAN diagnostic evidence · technical_manual
- OBDTotal technical manual index: BYD ATTO 3 diagnostic evidence · technical_manual
19. Frequently asked questions
What does BYD P1A0D00 mean?
It means “BIC2 voltage sampling abnormal” in the HV battery system.
Which vehicles are supported by the verified evidence?
BYD ATTO 3, model years 2022–2026, global; BYD DOLPHIN, model years 2021–2026, global; and BYD HAN, model year 2023, global.
Can I drive or charge with P1A0D00?
Not yet established by verified evidence.
What repair fixes P1A0D00?
Not yet established by verified evidence.