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Aion P16E291

P16E291

DriveUnknown. Safe driving status is not yet established by verified evidence.
ChargeUnknown. Safe charging status is not yet established by verified evidence.
ServiceService need is recorded as unknown. Because P16E291 is classified under BMS / traction battery and no verified public diagnostic procedure is supplied, contact an Aion-qualified service provider for diagnosis.
Confidence85%

Quick answer

P16E291 is a verified Aion diagnostic trouble code listed for several Aion EV models. Its full OEM meaning, symptoms, causes, driving and 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.

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1. What does P16E291 mean?

P16E291 is a verified Aion diagnostic trouble code listed for several Aion EV models. Its full OEM meaning, symptoms, causes, driving and charging status, and repair procedure are not yet established by verified evidence.

2. Technical explanation

Verified technical-manual indexes identify P16E291 for Aion vehicles, and the supplied diagnostic record classifies it under BMS / traction battery. The full OEM description is gated or not public in the available evidence, so no component-level fault definition can be confirmed.

3. What system is affected?

BMS / traction battery, according to the supplied diagnostic record.

4. How serious is this code?

Unknown. The supplied verified evidence does not assign a 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. Safe driving status is not yet established by verified evidence.

8. Can I charge the vehicle?

Unknown. Safe charging status is not yet established by verified evidence.

9. What you can safely do

  • Record the code exactly as P16E291 and retain any accompanying diagnostic codes or warning messages for service diagnosis.
  • Arrange diagnosis by an Aion-qualified service provider because the code is classified under BMS / traction battery.
  • Do not attempt high-voltage battery, battery-management-system, or traction-battery repairs without qualified EV service procedures.

10. Step-by-step troubleshooting

  1. Use appropriate diagnostic equipment to confirm whether P16E291 is present and identify any accompanying codes. Further troubleshooting steps are not yet established by verified evidence.
  2. Obtain the applicable OEM diagnostic procedure, as the available indexed manual evidence does not provide the public full code description or test procedure.

11. When to contact service

Service need is recorded as unknown. Because P16E291 is classified under BMS / traction battery and no verified public diagnostic procedure is supplied, contact an Aion-qualified service provider for diagnosis.

12. What the service center may check

  • Confirm P16E291 and record all accompanying diagnostic trouble codes. Specific service checks are not yet established by verified evidence.
  • Consult the applicable OEM service information for the model and model year. The available sources verify code listing only; they do not provide the full OEM description or repair procedure.

13. Possible repair or resolution

  • Not yet established by verified evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • No technical service bulletin information was supplied or verified for P16E291.

16. Recall information

  • No recall information was supplied or verified for P16E291.

17. Official manufacturer information

The supplied sources are technical-manual indexes rather than public full OEM diagnostic procedures. They verify that P16E291 is listed for the applicable Aion models, while stating that the full OEM description is gated or not public.

19. Frequently asked questions

What does Aion code P16E291 mean?

The exact OEM meaning is not yet established by verified evidence. The supplied sources verify the code identity but do not expose its full OEM description.

Which vehicles are verified to list P16E291?

Aion AION S MAX (2023), AION RT (2024), AION UT (2025), AION V (2024), and AION Y (2023–2024), all with GLOBAL applicability in the supplied evidence.

Is it safe to drive or charge with P16E291?

Neither driving safety nor charging safety is established by the supplied verified evidence.

20. Sources & verification

Verified
Aion P16E291: P16E291 | EV Diagnostics