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Cadillac B1AAE

Passive Entry Closure 2 Antenna Circuit High - Circuit Open

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceService is appropriate because official bulletin 24-NA-278 provides repair information for B1AAE.13 and identifies a BCM software update need.
Confidence95%

Quick answer

For a 2024 Cadillac LYRIQ in the US, DTC B1AAE.13 is identified as “Passive Entry Closure 2 Antenna Circuit High - Circuit Open.” Verified manufacturer bulletin 24-NA-278 addresses this code as a BCM software-update-needed concern.

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 B1AAE mean?

For a 2024 Cadillac LYRIQ in the US, DTC B1AAE.13 is identified as “Passive Entry Closure 2 Antenna Circuit High - Circuit Open.” Verified manufacturer bulletin 24-NA-278 addresses this code as a BCM software-update-needed concern.

2. Technical explanation

The verified evidence identifies B1AAE.13 as a passive-entry Closure 2 antenna circuit fault described as “Circuit High - Circuit Open.” Cadillac bulletin 24-NA-278 provides repair information for this concern and specifically identifies a needed Body Control Module (BCM) software update.

3. What system is affected?

Passive entry system / Body Control Module (BCM), based on the bulletin’s description.

4. How serious is this code?

Unknown. The supplied verified evidence does not assign a severity level.

5. Symptoms you may notice

  • A customer concern is referenced by bulletin 24-NA-278, but specific symptoms are not established by the supplied verified evidence.

6. Possible causes

  • BCM software update needed, as identified in Cadillac bulletin 24-NA-278.
  • Other causes are 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 service with a Cadillac dealer or qualified service facility and provide DTC B1AAE.13 and bulletin number 24-NA-278.
  • Do not attempt high-voltage-system repair procedures; the supplied evidence does not indicate that high-voltage repair is required.

10. Step-by-step troubleshooting

  1. A service facility can confirm the stored DTC and evaluate applicability of BCM software update information in bulletin 24-NA-278.
  2. Further diagnostic steps are not established by the supplied verified evidence.

11. When to contact service

Service is appropriate because official bulletin 24-NA-278 provides repair information for B1AAE.13 and identifies a BCM software update need.

12. What the service center may check

  • Confirm DTC B1AAE.13.
  • Review and apply, when applicable, the BCM software-update repair information in Cadillac bulletin 24-NA-278.

13. Possible repair or resolution

  • Cadillac bulletin 24-NA-278 identifies BCM software update information as the repair direction for the documented B1AAE.13 concern.
  • The exact service outcome after the update is not established by the supplied verified evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • 24-NA-278 — BCM Software Update Needed – DTC B1AAE.13: Passive Entry Closure 2 Antenna Circuit High - Circuit Open. NHTSA Manufacturer Communication IDs 11013096 and 11013653; published January 6, 2025 and January 24, 2025.

16. Recall information

  • No recall information was supplied in the verified evidence.

17. Official manufacturer information

Verified official source: NHTSA Manufacturer Communications 11013096 and 11013653 for Cadillac bulletin 24-NA-278: https://static.nhtsa.gov/odi/ffdd/tsbs/TSBS_RECEIVED_2025-2026.zip#nhtsa_id=11013096

19. Frequently asked questions

What does B1AAE.13 mean?

It means “Passive Entry Closure 2 Antenna Circuit High - Circuit Open,” according to the supplied diagnostic record and Cadillac bulletin evidence.

Which vehicle is supported by the verified evidence?

The supplied applicability evidence supports the 2024 Cadillac LYRIQ in the US.

Is there an official repair bulletin?

Yes. Cadillac bulletin 24-NA-278 addresses B1AAE.13 as a BCM software-update-needed concern.

Is it safe to drive or charge?

Not yet established by verified evidence.

20. Sources & verification

Verified
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