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BYD P157400

Power equipment fault

DriveUnknown. Whether the vehicle can be driven with P157400 is not established by verified evidence.
ChargeUnknown. Whether the vehicle can charge with P157400 is not established by verified evidence.
ServiceService requirement is unknown in the supplied diagnostic record. Because P157400 is assigned to the OBC system and no component-level diagnosis is verified, qualified BYD service assessment is appropriate if the code is present or charging concerns occur.
Confidence95%

Quick answer

BYD DTC P157400 indicates a power equipment fault in the OBC system. Verified applicability covers 2022–2026 BYD ATTO 3 and BYD SEAL vehicles globally.

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 P157400 mean?

BYD DTC P157400 indicates a power equipment fault in the OBC system. Verified applicability covers 2022–2026 BYD ATTO 3 and BYD SEAL vehicles globally.

2. Technical explanation

The verified ATTO 3 evidence defines P157400 as “Power equipment fault.” The verified SEAL technical-training evidence defines it as “Power supply equipment fault.” The diagnostic record assigns this DTC to the OBC system. The supplied evidence does not further identify the failed component, diagnostic conditions, fault logic, or repair procedure.

3. What system is affected?

OBC (on-board charger) system.

4. How serious is this code?

Unknown. Severity is not established by the verified evidence.

5. Symptoms you may notice

  • A stored OBC-system DTC P157400 may be present.
  • Specific driver-visible symptoms are not yet established by verified evidence.

6. Possible causes

  • A power equipment fault / power supply equipment fault, as defined by the verified source material.
  • The underlying component-level cause is not yet established by verified evidence.

7. Can I still drive the vehicle?

Unknown. Whether the vehicle can be driven with P157400 is not established by verified evidence.

8. Can I charge the vehicle?

Unknown. Whether the vehicle can charge with P157400 is not established by verified evidence.

9. What you can safely do

  • Record the exact DTC, vehicle model, model year, and charging circumstances for a qualified BYD service provider.
  • Do not attempt high-voltage or OBC disassembly based on this code alone.

10. Step-by-step troubleshooting

  1. Have a qualified service provider retrieve and assess the complete diagnostic fault record.
  2. Further diagnostic steps are not established by the verified evidence.

11. When to contact service

Service requirement is unknown in the supplied diagnostic record. Because P157400 is assigned to the OBC system and no component-level diagnosis is verified, qualified BYD service assessment is appropriate if the code is present or charging concerns occur.

12. What the service center may check

  • Confirm the stored DTC and assess the complete diagnostic fault record.
  • Specific test procedures, measurements, and component inspections are not yet established by verified evidence.

13. Possible repair or resolution

  • A verified repair resolution is not yet established by the supplied evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • No technical service bulletins are established by the supplied verified evidence.

16. Recall information

  • No recalls are established by the supplied verified evidence.

17. Official manufacturer information

Verified sources: OBDTotal technical manual index, “BYD ATTO 3 diagnostic evidence,” locator “ATTO 3 | ATTO 3 / Yuan Plus (SC2E) | P157400”; and Indexed technical document, “BYD SEAL diagnostic evidence,” locator “SEAL | European technical-training vehicle | P157400.”

19. Frequently asked questions

What does BYD P157400 mean?

For the BYD ATTO 3, verified evidence states “Power equipment fault.” For the BYD SEAL, verified evidence states “Power supply equipment fault.”

Which BYD vehicles are verified as applicable?

The supplied applicability evidence covers global 2022–2026 BYD ATTO 3 and 2022–2026 BYD SEAL vehicles.

Is P157400 an OBC code?

Yes. The supplied diagnostic record assigns P157400 to the OBC system.

Can I drive or charge with P157400?

Not yet established by verified evidence.

20. Sources & verification

Verified
BYD P157400: Power equipment fault | EV Diagnostics