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BYD P2B9100

DC charging port voltage abnormal

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceService need is not established by the supplied evidence; however, diagnosis by a qualified BYD EV service provider is appropriate for a DC charging port voltage DTC.
Confidence95%

Quick answer

P2B9100 indicates “DC charging port voltage abnormal” on applicable BYD ATTO 3 vehicles.

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 P2B9100 mean?

P2B9100 indicates “DC charging port voltage abnormal” on applicable BYD ATTO 3 vehicles.

2. Technical explanation

Verified evidence identifies P2B9100 as a DC-charging-system DTC for an abnormal voltage condition at the DC charging port. The available evidence does not define the voltage threshold, test conditions, detection logic, or component-level fault path.

3. What system is affected?

DC charging

4. How serious is this code?

Unknown. The supplied verified evidence does not establish severity.

5. Symptoms you may notice

  • A stored DTC P2B9100 may be present.
  • No additional symptoms are established by verified evidence.

6. Possible causes

  • 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

  • Record the exact DTC and any accompanying diagnostic information.
  • Arrange professional diagnosis using applicable BYD service information.
  • Do not attempt high-voltage charging-port or DC-charging-system repairs yourself.

10. Step-by-step troubleshooting

  1. Verify that P2B9100 is present with suitable diagnostic equipment.
  2. Use applicable BYD diagnostic procedures to assess the abnormal DC charging port voltage condition.
  3. No further troubleshooting steps are established by the supplied verified evidence.

11. When to contact service

Service need is not established by the supplied evidence; however, diagnosis by a qualified BYD EV service provider is appropriate for a DC charging port voltage DTC.

12. What the service center may check

  • Confirm DTC P2B9100 and review associated diagnostic information.
  • Perform manufacturer-specified diagnosis for the DC charging port voltage abnormal condition.
  • Specific service checks are not established by the supplied verified evidence.

13. Possible repair or resolution

  • Not yet established by verified evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • No TSB or service bulletin information was supplied as verified evidence.

16. Recall information

  • No recall information was supplied as verified evidence.

17. Official manufacturer information

Verified source: OBDTotal technical manual index, “BYD ATTO 3 diagnostic evidence,” locator: “ATTO 3 | ATTO 3 / Yuan Plus (SC2E) | P2B9100.” The supplied evidence applies to BYD ATTO 3 model years 2022–2026 in the GLOBAL region.

19. Frequently asked questions

What does BYD code P2B9100 mean?

It means “DC charging port voltage abnormal.”

Which vehicles are covered by the supplied evidence?

BYD ATTO 3 vehicles from model years 2022 through 2026 in the GLOBAL region.

Can I drive or charge with P2B9100?

Not yet established by verified evidence.

What causes P2B9100?

Not yet established by verified evidence.

20. Sources & verification

Verified
BYD P2B9100: DC charging port voltage abnormal | EV Diagnostics