BYD P2B7100
Voltage sampling disconnected - serious fault
Quick answer
BYD DTC P2B7100 means: “Voltage sampling disconnected - serious fault.” It is identified in the supplied technical-manual evidence as an HV battery diagnostic code.
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1. What does P2B7100 mean?
BYD DTC P2B7100 means: “Voltage sampling disconnected - serious fault.” It is identified in the supplied technical-manual evidence as an HV battery diagnostic code.
2. Technical explanation
The verified evidence establishes that P2B7100 is an HV battery-related DTC with the meaning “Voltage sampling disconnected - serious fault.” The evidence does not provide diagnostic thresholds, circuit details, root cause, symptoms, or a repair procedure.
3. What system is affected?
HV battery
4. How serious is this code?
The supplied title and meaning describe it as a “serious fault.” The database severity value is otherwise listed as unknown.
5. Symptoms you may notice
- Not yet established by verified evidence.
6. Possible causes
- A voltage-sampling disconnection is indicated by the verified DTC meaning.
- Specific components, wiring conditions, connector issues, battery-module conditions, or other root causes are 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
- Arrange assessment by a qualified BYD EV service provider.
- Do not attempt high-voltage battery diagnosis, disassembly, or repair without appropriate qualified service procedures.
10. Step-by-step troubleshooting
- Read and document P2B7100 using suitable diagnostic equipment.
- Further diagnostic steps are not yet established by verified evidence.
11. When to contact service
Service need is listed as unknown in the supplied database. Because the verified DTC description calls this a serious fault in the HV battery system, qualified BYD EV service assessment is appropriate.
12. What the service center may check
- Confirm the presence of DTC P2B7100.
- Additional service 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
- 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 identifies P2B7100 as “Voltage sampling disconnected - serious fault” for the listed BYD applications. No OEM-issued repair instructions, bulletin, or recall information was supplied.
- 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 code P2B7100 mean?
It means “Voltage sampling disconnected - serious fault.”
Which system is affected by P2B7100?
The supplied diagnostic record identifies the affected system as the HV battery.
Can I drive or charge with P2B7100?
Not yet established by verified evidence.
Which BYD vehicles are covered by the supplied evidence?
BYD ATTO 3 model years 2022–2026 globally; BYD DOLPHIN model years 2021–2026 globally; and BYD HAN model year 2023 globally.