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BYD P2BA300

Power battery not equalized at bottom

DriveUnknown. The supplied verified evidence does not establish whether driving is safe with P2BA300 present.
ChargeUnknown. The supplied verified evidence does not establish whether charging is safe with P2BA300 present.
ServiceService need is unknown in the supplied evidence. Because this is an HV-battery code and no verified driveability or charging guidance is provided, contact a BYD service provider for vehicle-specific assessment.
Confidence95%

Quick answer

P2BA300 on a BYD ATTO 3 (model years 2022–2026, Global applicability) indicates: “Power battery not equalized at bottom.”

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 P2BA300 mean?

P2BA300 on a BYD ATTO 3 (model years 2022–2026, Global applicability) indicates: “Power battery not equalized at bottom.”

2. Technical explanation

Verified technical-manual evidence identifies P2BA300 as an HV-battery diagnostic trouble code meaning “Power battery not equalized at bottom.” The supplied evidence does not further define the monitored conditions, thresholds, root cause, or vehicle response associated with this code.

3. What system is affected?

HV battery / power battery.

4. How serious is this code?

Unknown. The supplied verified evidence does not establish severity.

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. The supplied verified evidence does not establish whether driving is safe with P2BA300 present.

8. Can I charge the vehicle?

Unknown. The supplied verified evidence does not establish whether charging is safe with P2BA300 present.

9. What you can safely do

  • Record the displayed DTC exactly as P2BA300.
  • Arrange diagnosis by a qualified BYD service provider or appropriately trained EV technician.
  • Do not attempt high-voltage battery disassembly or repair.

10. Step-by-step troubleshooting

  1. Use suitable diagnostic equipment to confirm whether P2BA300 is current, pending, or stored.
  2. Not yet established by verified evidence: specific diagnostic test steps, measurements, or acceptance criteria.

11. When to contact service

Service need is unknown in the supplied evidence. Because this is an HV-battery code and no verified driveability or charging guidance is provided, contact a BYD service provider for vehicle-specific assessment.

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

  • Not yet established by verified evidence.

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Verified source: OBDTotal technical manual index, “BYD ATTO 3 diagnostic evidence,” locator: ATTO 3 | ATTO 3 / Yuan Plus (SC2E) | P2BA300. https://obdtotal.com/product/byd-atto3-yuanplus-sc2e-service-manual/

19. Frequently asked questions

What does BYD code P2BA300 mean?

For the BYD ATTO 3, P2BA300 means “Power battery not equalized at bottom.”

Which vehicles are supported by the supplied evidence?

The supplied applicability evidence covers BYD ATTO 3 model years 2022–2026 in the Global region.

Can I drive with P2BA300?

Not yet established by verified evidence.

Can I charge with P2BA300?

Not yet established by verified evidence.

20. Sources & verification

Verified
BYD P2BA300: Power battery not equalized at bottom | EV Diagnostics