BYD P268700
Power relay echo check fault
Quick answer
P268700 on a BYD ATTO 3 is identified as a “Power relay echo check fault” in the HV control 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 P268700 mean?
P268700 on a BYD ATTO 3 is identified as a “Power relay echo check fault” in the HV control system.
2. Technical explanation
Verified diagnostic evidence identifies DTC P268700 as “Power relay echo check fault.” The supplied evidence does not further define the monitored relay, enable conditions, fault logic, or diagnostic procedure.
3. What system is affected?
HV control
4. How serious is this code?
Unknown. Severity is not yet established by verified evidence.
5. Symptoms you may notice
- Not yet established by verified evidence.
6. Possible causes
- A power relay echo check fault is indicated by the verified diagnostic title. The underlying cause is not yet established by verified evidence.
7. Can I still drive the vehicle?
Unknown. Whether the vehicle can be driven is not yet established by verified evidence.
8. Can I charge the vehicle?
Unknown. Whether the vehicle can be charged is not yet established by verified evidence.
9. What you can safely do
- Do not attempt high-voltage relay diagnosis or repair without qualified EV service training and manufacturer procedures.
- Arrange professional diagnosis if P268700 is present.
10. Step-by-step troubleshooting
- Confirm the stored DTC with suitable diagnostic equipment.
- Use BYD service information and qualified EV diagnostic procedures to investigate the fault. Specific test steps are not yet established by verified evidence.
11. When to contact service
Service requirement is unknown in the supplied evidence. Because this is an HV control DTC, professional EV diagnosis is appropriate.
12. What the service center may check
- Read and document DTC P268700. Further service checks are not yet established by verified evidence.
13. Possible repair or resolution
- Not yet established by verified evidence.
14. Affected vehicles
- BYD ATTO 3 · 2022–2026 · GLOBAL
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) / P268700. The evidence states: “Power relay echo check fault.”
- OBDTotal technical manual index: BYD ATTO 3 diagnostic evidence · technical_manual
19. Frequently asked questions
What does BYD code P268700 mean?
It means “Power relay echo check fault.”
Which vehicles are covered by the supplied evidence?
BYD ATTO 3, model years 2022 through 2026, Global region.
Can I drive with P268700?
Not yet established by verified evidence.
Can I charge with P268700?
Not yet established by verified evidence.