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BYD P1D9117

Total voltage of power battery seriously high

DriveUnknown. Safe-to-drive status is not established by verified evidence.
ChargeUnknown. Safe-to-charge status is not established by verified evidence.
ServiceService requirement is listed as unknown in the supplied diagnostic data. Because this code concerns the high-voltage battery system, qualified BYD EV service assessment is appropriate.
Confidence95%

Quick answer

P1D9117 on a BYD ATTO 3 indicates: “Total voltage of power battery seriously high.”

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 P1D9117 mean?

P1D9117 on a BYD ATTO 3 indicates: “Total voltage of power battery seriously high.”

2. Technical explanation

Verified evidence identifies P1D9117 as a VCU/HV battery diagnostic trouble code for an excessively high total traction-battery voltage condition. The supplied evidence does not establish the threshold, operating conditions, root cause, or diagnostic procedure.

3. What system is affected?

VCU/HV battery

4. How serious is this code?

Unknown. The code description states that total power-battery voltage is seriously high, but the supplied evidence does not provide a severity classification.

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. Safe-to-drive status is not established by verified evidence.

8. Can I charge the vehicle?

Unknown. Safe-to-charge status is not established by verified evidence.

9. What you can safely do

  • Do not attempt high-voltage battery or VCU repairs yourself.
  • Have the vehicle assessed by qualified BYD EV service personnel.

10. Step-by-step troubleshooting

  1. Retrieve and document P1D9117 with suitable diagnostic equipment.
  2. Further troubleshooting steps are not yet established by verified evidence.

11. When to contact service

Service requirement is listed as unknown in the supplied diagnostic data. Because this code concerns the high-voltage battery system, qualified BYD EV service assessment is appropriate.

12. What the service center may check

  • Not yet established by 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 technical-manual evidence: OBDTotal technical manual index, “BYD ATTO 3 diagnostic evidence,” locator: ATTO 3 / Yuan Plus (SC2E) / P1D9117. Applicability supplied: BYD ATTO 3, model years 2022–2026, Global.

19. Frequently asked questions

What does BYD code P1D9117 mean?

It means “Total voltage of power battery seriously high.”

Which vehicles is this code verified for?

The supplied applicability evidence covers the BYD ATTO 3 / Yuan Plus (SC2E), model years 2022–2026, Global.

Can I drive or charge with P1D9117?

Safe-to-drive and safe-to-charge status are not established by verified evidence.

20. Sources & verification

Verified
BYD P1D9117: Total voltage of power battery seriously high | EV Diagnostics