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BYD P1A2100

BIC2 temperature sampling abnormal

DriveUnknown. The supplied verified evidence does not establish whether driving is safe.
ChargeUnknown. The supplied verified evidence does not establish whether charging is safe.
ServiceService requirement is unknown in the supplied diagnostic record. Because P1A2100 is identified with the HV battery system and no verified owner-level procedure was supplied, contact a qualified BYD service provider for diagnosis.
Confidence95%

Quick answer

BYD DTC P1A2100 means: BIC2 temperature sampling abnormal. It is identified as an HV battery-system diagnostic code.

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 P1A2100 mean?

BYD DTC P1A2100 means: BIC2 temperature sampling abnormal. It is identified as an HV battery-system diagnostic code.

2. Technical explanation

Verified technical-manual index evidence identifies P1A2100 as “BIC2 temperature sampling abnormal.” The supplied evidence does not define BIC2 further, describe the sampling fault mechanism, or provide a diagnostic/repair procedure.

3. What system is affected?

HV battery

4. How serious is this code?

Unknown. The supplied verified evidence does not establish severity.

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. The supplied verified evidence does not establish whether driving is safe.

8. Can I charge the vehicle?

Unknown. The supplied verified evidence does not establish whether charging is safe.

9. What you can safely do

  • Do not attempt high-voltage battery diagnosis or repair yourself.
  • Arrange assessment by a qualified BYD service provider; the supplied evidence identifies this as an HV battery-system code but does not provide owner-level troubleshooting steps.

10. Step-by-step troubleshooting

  1. Not yet established by verified evidence. No verified diagnostic test sequence, wiring check, component test, or reset procedure was supplied.

11. When to contact service

Service requirement is unknown in the supplied diagnostic record. Because P1A2100 is identified with the HV battery system and no verified owner-level procedure was supplied, contact a qualified BYD service provider for diagnosis.

12. What the service center may check

  • Not yet established by verified evidence. The supplied sources confirm the code description only and do not specify service checks.

13. Possible repair or resolution

  • Not yet established by verified evidence. No verified repair or resolution is supplied.

14. Affected vehicles

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 consists of technical-manual index entries for BYD ATTO 3 / Yuan Plus (SC2E), BYD DOLPHIN 2021 family, and BYD HAN 2023 Champion/Supreme family. Each entry associates P1A2100 with “BIC2 temperature sampling abnormal.” Sources: OBDTotal technical manual index, https://obdtotal.com/product/byd-atto3-yuanplus-sc2e-service-manual/; 17VIN technical manual index, https://en.17vin.com/automotive_repair_manual_wiring_diagrams/BYD/2123.html; 17VIN technical manual index, https://en.17vin.com/automotive_repair_manual_wiring_diagrams/BYD/2120.html. The supplied evidence is dated as last verified 2026-09-25.

19. Frequently asked questions

What does BYD code P1A2100 mean?

It means “BIC2 temperature sampling abnormal,” according to the supplied verified technical-manual index evidence.

Which BYD vehicles are supported 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.

Can I drive or charge with P1A2100?

Not yet established by verified evidence. The supplied record lists both driving and charging status as unknown.

What repair fixes P1A2100?

Not yet established by verified evidence. No verified repair procedure or repair outcome was supplied.

20. Sources & verification

Verified
BYD P1A2100: BIC2 temperature sampling abnormal | EV Diagnostics