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Cadillac P0AA6

voltage battery surge tank and document via photo. 3. Observe and record th

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceContact a Cadillac/GM certified repair facility. The bulletin states that repairs require specific training, tools, equipment, and successful completion of required technician training.
Confidence95%

Quick answer

P0AA6 is documented in Cadillac bulletin 23-NA-151 for certain US Cadillac LYRIQ and VISTIQ vehicles. The supplied diagnostic title and meaning are truncated and do not establish a reliable plain-language definition for this code. Cadillac/GM directs this bulletin only to trained, certified repair facilities.

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 P0AA6 mean?

P0AA6 is documented in Cadillac bulletin 23-NA-151 for certain US Cadillac LYRIQ and VISTIQ vehicles. The supplied diagnostic title and meaning are truncated and do not establish a reliable plain-language definition for this code. Cadillac/GM directs this bulletin only to trained, certified repair facilities.

2. Technical explanation

Verified NHTSA-hosted GM bulletin 23-NA-151 includes P0AA6 in its diagnostic process. The bulletin directs technicians to verify whether listed DTCs are current or history, document the customer concern, inspect and photograph coolant level in the high-voltage battery surge tank, and—on the April 2025 version—includes mention of pack damage and SPS data-dump capture. The supplied evidence does not establish the specific electrical fault represented by P0AA6.

3. What system is affected?

Not yet established by verified evidence. Bulletin 23-NA-151 does reference the high-voltage battery surge tank and, in the April 2025 version, pack damage and data capture.

4. How serious is this code?

Not yet established by verified evidence.

5. Symptoms you may notice

  • A no-start condition is referenced as a customer-concern question in the December 2024 and November 2024 versions of bulletin 23-NA-151.
  • Other symptoms are not yet established by verified evidence.

6. Possible causes

  • Not yet established by verified evidence.

7. Can I still drive the vehicle?

Not yet established by verified evidence.

8. Can I charge the vehicle?

Not yet established by verified evidence.

9. What you can safely do

  • Arrange assessment by a Cadillac/GM qualified service facility.
  • Provide the service facility with the stored DTC status and a clear description of the concern.
  • Do not attempt high-voltage battery diagnosis or repair yourself; GM states this bulletin is for professional technicians, not do-it-yourselfers.

10. Step-by-step troubleshooting

  1. A trained technician following bulletin 23-NA-151 verifies applicable DTCs as current or history.
  2. The bulletin calls for documenting a clear and thorough description of the customer concern.
  3. The bulletin calls for visual inspection and photo documentation of coolant level in the high-voltage battery surge tank.
  4. The April 2025 bulletin version mentions pack-damage consideration and SPS data-dump capture.

11. When to contact service

Contact a Cadillac/GM certified repair facility. The bulletin states that repairs require specific training, tools, equipment, and successful completion of required technician training.

12. What the service center may check

  • Verify relevant DTCs, including P0AA6, as current or history as directed by the applicable revision of 23-NA-151.
  • Document the customer concern, including whether the vehicle was towed because of a no-start condition when applicable.
  • Visually inspect and photograph coolant level in the high-voltage battery surge tank.
  • Perform bulletin-directed pack-damage review and SPS data-dump capture where applicable.

13. Possible repair or resolution

  • Not yet established by verified evidence. The supplied bulletin summaries document diagnostic and data-collection steps, not a confirmed repair for P0AA6.

14. Affected vehicles

15. Related TSBs / service bulletins

  • GM/Cadillac bulletin 23-NA-151, NHTSA communication 10243714, published September 5, 2023.
  • GM/Cadillac bulletin 23-NA-151, NHTSA communication 10245234, published October 19, 2023.
  • GM/Cadillac bulletin 23-NA-151, NHTSA communication 11011944, published November 20, 2024.
  • GM/Cadillac bulletin 23-NA-151, NHTSA communication 11012693, published December 11, 2024.
  • GM/Cadillac bulletin 23-NA-151, NHTSA communication 11017886, published April 9, 2025.

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Official evidence: NHTSA-hosted GM manufacturer communications for bulletin 23-NA-151: https://static.nhtsa.gov/odi/tsbs/2025/MC-11017886-0001.pdf

19. Frequently asked questions

What does P0AA6 mean on these Cadillac vehicles?

The supplied diagnostic title and canonical meaning are truncated, and the supplied official bulletin summaries do not define the code’s precise meaning. Not yet established by verified evidence.

Which vehicles are covered by the supplied applicability data?

US Cadillac LYRIQ model years 2023–2026 and Cadillac VISTIQ model years 2023–2026 are listed. LYRIQ applicability appears in overlapping ranges in the supplied data; this does not independently confirm coverage for every individual VIN.

Is P0AA6 covered by a service bulletin?

Yes. P0AA6 is included in GM/Cadillac bulletin 23-NA-151, with NHTSA-hosted versions from 2023 through April 2025.

Can I repair this myself?

No. GM states that this bulletin is intended for professional technicians and not do-it-yourselfers, and that repairs require specific training, tools, and equipment.

20. Sources & verification

ReferenceAccepted ResearchVerified
Cadillac P0AA6: voltage battery surge tank and document via photo. 3.… | EV Diagnostics