EV Diagnostics
Verified EV diagnostic knowledge page

Aion P16E391

P16E391

DriveUnknown. Not yet established by verified evidence.
ChargeUnknown. Not yet established by verified evidence.
ServiceService is advisable because P16E391 is identified in the BMS / traction battery system, but urgency is not established by verified evidence. Seek qualified Aion or EV service diagnosis, particularly if the vehicle displays additional warnings or changes in driving or charging behavior.
Confidence85%

Quick answer

P16E391 is a verified Aion diagnostic trouble code listed under the BMS / traction battery system. Its OEM meaning, driving/charging status, severity, causes, symptoms, and repair procedure are not yet established by verified evidence.

This page separates verified manufacturer/regulator evidence from supporting material. Unsupported causes, repairs or safety conclusions are not guessed.

Video guides

Watch Videos

Relevant videos play here without leaving this diagnostic page.

No sufficiently relevant embeddable video has been accepted for this diagnostic yet.

Videos are supporting material and never override OEM or regulator evidence.

1. What does P16E391 mean?

P16E391 is a verified Aion diagnostic trouble code listed under the BMS / traction battery system. Its OEM meaning, driving/charging status, severity, causes, symptoms, and repair procedure are not yet established by verified evidence.

2. Technical explanation

Verified technical-manual indexes list DTC P16E391 for specified Aion vehicles. The available evidence confirms the code identity and its classification in the BMS / traction battery system, but the full OEM description is gated or not public. Therefore, no expansion of the code suffix or fault meaning can be confirmed from the supplied evidence.

3. What system is affected?

BMS / traction battery.

4. How serious is this code?

Unknown. Not yet established by 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. Not yet established by verified evidence.

8. Can I charge the vehicle?

Unknown. Not yet established by verified evidence.

9. What you can safely do

  • Record the displayed code exactly as P16E391.
  • Arrange diagnosis by a qualified Aion service provider or EV technician with appropriate diagnostic access.
  • Do not attempt high-voltage battery or BMS repair procedures.

10. Step-by-step troubleshooting

  1. Use appropriate diagnostic equipment to confirm whether P16E391 is current or stored and to retrieve associated diagnostic information. Specific test steps are not yet established by verified evidence.
  2. Check the vehicle-specific OEM service information using the vehicle identification number. The public evidence does not provide the full OEM code description or diagnostic workflow.

11. When to contact service

Service is advisable because P16E391 is identified in the BMS / traction battery system, but urgency is not established by verified evidence. Seek qualified Aion or EV service diagnosis, particularly if the vehicle displays additional warnings or changes in driving or charging behavior.

12. What the service center may check

  • Confirm P16E391 with vehicle-compatible diagnostic equipment.
  • Retrieve the complete OEM fault definition and diagnostic procedure for the specific vehicle.
  • Review associated diagnostic information. The specific related data items are not yet established by verified evidence.

13. Possible repair or resolution

  • Not yet established by verified evidence. The supplied sources do not provide an OEM repair or resolution for P16E391.

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 evidence consists of technical-manual index entries that explicitly list P16E391 for the applicable Aion models. The full OEM description is reported as gated or not public. Sources: 17VIN technical manual index entries for AION S MAX, AION RT, and AION UT; Technical manual index entries for AION V and AION Y.

19. Frequently asked questions

What does Aion code P16E391 mean?

The detailed OEM meaning is not yet established by verified evidence. Available sources confirm only that P16E391 is listed in the BMS / traction battery system for specified Aion vehicles.

Can I drive with P16E391?

Unknown. The supplied evidence does not establish whether driving is permitted or restricted for this code.

Can I charge with P16E391?

Unknown. The supplied evidence does not establish whether charging is permitted or restricted for this code.

Which vehicles are verified to list P16E391?

Aion AION RT model year 2024; AION S MAX model year 2023; AION UT model year 2025; AION V model year 2024; and AION Y model years 2023–2024. All listed applicability is GLOBAL.

20. Sources & verification

Verified
Aion P16E391: P16E391 | EV Diagnostics