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BYD P1ED316

Low-voltage-side supply voltage too high

DriveUnknown. Whether the vehicle can be driven is not established by the verified evidence.
ChargeUnknown. Whether the vehicle can be charged is not established by the verified evidence.
ServiceService need is listed as unknown in the supplied diagnostic record. Because this code concerns the DC-DC system and low-voltage-side supply voltage, seek qualified diagnosis if the code is present.
Confidence95%

Quick answer

P1ED316 on a BYD ATTO 3 indicates: “Low-voltage-side supply voltage too high” in the DC-DC 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 P1ED316 mean?

P1ED316 on a BYD ATTO 3 indicates: “Low-voltage-side supply voltage too high” in the DC-DC system.

2. Technical explanation

Verified diagnostic evidence identifies P1ED316 as a DC-DC-related DTC for an excessively high low-voltage-side supply voltage. The supplied evidence does not establish a specific voltage threshold, test conditions, root cause, or repair procedure.

3. What system is affected?

DC-DC system; low-voltage-side supply.

4. How serious is this code?

Unknown. Severity is not established by the 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 is not established by the verified evidence.

8. Can I charge the vehicle?

Unknown. Whether the vehicle can be charged is not established by the verified evidence.

9. What you can safely do

  • Arrange diagnosis by a qualified BYD service provider or appropriately trained EV technician.
  • Do not attempt high-voltage or DC-DC system repairs yourself.

10. Step-by-step troubleshooting

  1. The verified evidence confirms the DTC meaning only. Diagnostic test steps, specifications, and component-level checks are not yet established by verified evidence.

11. When to contact service

Service need is listed as unknown in the supplied diagnostic record. Because this code concerns the DC-DC system and low-voltage-side supply voltage, seek qualified diagnosis if the code is present.

12. What the service center may check

  • Confirm and document P1ED316 with suitable diagnostic equipment.
  • Further service checks are 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 technical service bulletins were supplied as verified evidence.

16. Recall information

  • No recalls were supplied as verified evidence.

17. Official manufacturer information

Verified source: OBDTotal technical manual index, “BYD ATTO 3 diagnostic evidence,” locator: ATTO 3 / Yuan Plus (SC2E) / P1ED316. The supplied applicability evidence covers BYD ATTO 3 model years 2022–2026 in the GLOBAL region.

19. Frequently asked questions

What does BYD code P1ED316 mean?

It means “Low-voltage-side supply voltage too high” and is assigned to the DC-DC system.

Which vehicles are supported by the supplied evidence?

BYD ATTO 3, model years 2022 through 2026, GLOBAL region.

Can I drive or charge with P1ED316?

Not yet established by verified evidence.

What causes P1ED316?

Not yet established by verified evidence.

20. Sources & verification

Verified
BYD P1ED316: Low-voltage-side supply voltage too high | EV Diagnostics