EV Diagnostics
Verified EV diagnostic knowledge page

Aion P16E491

P16E491

DriveUnknown. Whether the vehicle can be driven with P16E491 is not yet established by verified evidence.
ChargeUnknown. Whether the vehicle can be charged with P16E491 is not yet established by verified evidence.
ServiceService need is unknown in the supplied evidence. Because the code is associated with the BMS / traction battery system and no OEM diagnostic procedure is publicly established here, professional diagnosis is appropriate.
Confidence85%

Quick answer

P16E491 is a verified DTC listing for certain Aion vehicles in the BMS / traction-battery system. Its OEM definition, symptoms, causes, driving status, charging status, 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 P16E491 mean?

P16E491 is a verified DTC listing for certain Aion vehicles in the BMS / traction-battery system. Its OEM definition, symptoms, causes, driving status, charging status, and repair procedure are not yet established by verified evidence.

2. Technical explanation

Verified technical-manual index evidence identifies P16E491 as an Aion diagnostic code associated with the BMS / traction battery system. The publicly available evidence does not provide the full OEM fault description; therefore, no specific fault meaning can be stated.

3. What system is affected?

BMS / traction battery.

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

  • Not yet established by verified evidence.

7. Can I still drive the vehicle?

Unknown. Whether the vehicle can be driven with P16E491 is not yet established by verified evidence.

8. Can I charge the vehicle?

Unknown. Whether the vehicle can be charged with P16E491 is not yet established by verified evidence.

9. What you can safely do

  • Arrange diagnosis using appropriate Aion service information and diagnostic equipment.
  • Do not attempt traction-battery or high-voltage-system repairs yourself.

10. Step-by-step troubleshooting

  1. Confirm the stored DTC and obtain the complete OEM definition and diagnostic procedure for the specific vehicle.
  2. Not yet established by verified evidence: any further diagnostic sequence, measurements, component tests, or repair steps.

11. When to contact service

Service need is unknown in the supplied evidence. Because the code is associated with the BMS / traction battery system and no OEM diagnostic procedure is publicly established here, professional diagnosis is appropriate.

12. What the service center may check

  • Retrieve the complete OEM DTC description and diagnostic procedure for P16E491 for the specific Aion model and model year.
  • Not yet established by verified evidence: specific inspections, test values, wiring checks, battery checks, software actions, or component replacements.

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 technical-manual index listings identify P16E491 for Aion AION RT, AION S MAX, AION UT, AION V, and AION Y applications listed on this page. The full OEM description is gated or not publicly available in the supplied evidence. Sources: 17VIN technical manual index for AION S MAX, AION RT, and AION UT; Technical manual index listings for AION V and AION Y.

19. Frequently asked questions

What does Aion code P16E491 mean?

The exact OEM meaning is not yet established by verified evidence. The verified listings place it in the BMS / traction-battery system.

Which vehicles have verified listings for P16E491?

Verified listings apply globally to the 2024 Aion AION RT, 2023 Aion AION S MAX, 2025 Aion AION UT, 2024 Aion AION V, and 2023–2024 Aion AION Y.

Can I drive or charge with P16E491?

Driving and charging status are not yet established by verified evidence.

20. Sources & verification

Verified
Aion P16E491: P16E491 | EV Diagnostics