BYD U029600
Communication with power battery management module lost
Quick answer
For BYD ATTO 3 model years 2022–2026 (Global), DTC U029600 means: “Communication with power battery management module lost.”
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 U029600 mean?
For BYD ATTO 3 model years 2022–2026 (Global), DTC U029600 means: “Communication with power battery management module lost.”
2. Technical explanation
This is a Network-system diagnostic trouble code. Verified evidence establishes that the vehicle has lost communication with the power battery management module. The supplied evidence does not establish the specific failed component, wiring condition, communication network, or repair procedure.
3. What system is affected?
Network; communication with the power battery management module.
4. How serious is this code?
Unknown. Severity is not established by verified evidence.
5. Symptoms you may notice
- Not yet established by verified evidence.
6. Possible causes
- A specific cause is not yet established by verified evidence.
7. Can I still drive the vehicle?
Unknown. Whether the vehicle can be driven is not established by verified evidence.
8. Can I charge the vehicle?
Unknown. Whether the vehicle can be charged is not established by verified evidence.
9. What you can safely do
- Do not attempt high-voltage battery or battery-management-module repairs.
- Arrange diagnosis by a qualified BYD service provider or appropriately trained EV technician.
10. Step-by-step troubleshooting
- Use professional diagnostic equipment to confirm U029600 and assess the reported loss of communication with the power battery management module.
- Further diagnostic steps are not established by the supplied verified evidence.
11. When to contact service
Service requirement is unknown in the supplied diagnostic record. Because this code concerns communication with the power battery management module, qualified EV diagnosis is appropriate.
12. What the service center may check
- Confirm the presence and status of DTC U029600.
- Diagnose the loss of communication with the power battery management module using approved service information and equipment.
- Specific inspection, test, or repair 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) / U029600. Applicability supplied: BYD ATTO 3, 2022–2026, Global.
- OBDTotal technical manual index: BYD ATTO 3 diagnostic evidence · technical_manual
19. Frequently asked questions
What does BYD code U029600 mean?
It means “Communication with power battery management module lost.”
Which vehicles does this evidence apply to?
The supplied applicability evidence covers the BYD ATTO 3, model years 2022 through 2026, Global region.
Can I drive or charge with U029600?
Driving and charging status are not established by verified evidence.
What repair fixes U029600?
A specific repair is not established by the supplied verified evidence.