EV Diagnostics
Verified EV diagnostic knowledge page

Cadillac B1D73

04 may set in the radio, along with DTCs in the BCM for the VCD • Black screen • Drive mode titles and icons overlap • Icon changes • Not a

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceContact a Cadillac dealer or qualified Cadillac service provider for diagnosis. The supplied evidence does not establish a do-it-yourself repair.
Confidence95%

Quick answer

For a 2023 Cadillac LYRIQ in the United States, DTC B1D73-04 may set in the radio along with BCM DTCs for the VCD. Verified bulletin evidence associates this with infotainment/display concerns including a black screen, overlapping drive-mode titles and icons, and icon changes.

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 B1D73 mean?

For a 2023 Cadillac LYRIQ in the United States, DTC B1D73-04 may set in the radio along with BCM DTCs for the VCD. Verified bulletin evidence associates this with infotainment/display concerns including a black screen, overlapping drive-mode titles and icons, and icon changes.

2. Technical explanation

The supplied verified evidence identifies B1D73-04 as a radio-set DTC that may occur together with BCM DTCs for the VCD. The evidence does not establish a full diagnostic definition, circuit-level fault, root cause, or repair procedure for B1D73-04.

3. What system is affected?

Radio/infotainment display, with possible BCM DTCs related to the VCD.

4. How serious is this code?

Unknown. The verified evidence documents display and infotainment concerns but does not provide a safety or severity classification.

5. Symptoms you may notice

  • Black screen.
  • Drive-mode titles and icons overlap.
  • Icon changes.
  • B1D73-04 may set in the radio.
  • DTCs may also be present in the BCM for the VCD.

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

  • Record the displayed symptoms and any stored DTCs before seeking service.
  • Arrange Cadillac service if the black screen, overlapping drive-mode display, icon changes, or DTCs are present.

10. Step-by-step troubleshooting

  1. Confirm whether B1D73-04 is stored in the radio.
  2. Check whether BCM DTCs for the VCD are also stored.
  3. Document whether a black screen, overlapping drive-mode titles/icons, or icon changes are present.
  4. Further diagnostic steps are not established by the supplied verified evidence.

11. When to contact service

Contact a Cadillac dealer or qualified Cadillac service provider for diagnosis. The supplied evidence does not establish a do-it-yourself repair.

12. What the service center may check

  • Retrieve radio DTCs, including B1D73-04.
  • Retrieve BCM DTCs for the VCD.
  • Verify the reported display behavior, including black screen, overlapping drive-mode titles/icons, and icon changes.

13. Possible repair or resolution

  • Not yet established by verified evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • NHTSA Manufacturer Communication PDF 11014280, Cadillac bulletin 24-NA-155, published February 7, 2025. The supplied evidence states that B1D73-04 may set in the radio along with BCM DTCs for the VCD and lists black screen, overlapping drive-mode titles/icons, and icon changes.

16. Recall information

  • No recall information was supplied in the verified evidence.

17. Official manufacturer information

Official source: NHTSA Manufacturer Communication PDF 11014280, Cadillac bulletin 24-NA-155: https://static.nhtsa.gov/odi/tsbs/2025/MC-11014280-0001.pdf

19. Frequently asked questions

What does B1D73-04 mean on a 2023 Cadillac LYRIQ?

The supplied evidence states that B1D73-04 may set in the radio along with BCM DTCs for the VCD. A complete fault definition is not established by the supplied evidence.

What symptoms are associated with B1D73-04?

Verified evidence lists a black screen, drive-mode titles and icons that overlap, and icon changes.

Is B1D73-04 safe to drive with?

Not yet established by verified evidence.

Does B1D73-04 affect charging?

Not yet established by verified evidence.

20. Sources & verification

Verified
Cadillac B1D73: 04 may set in the radio, along with DTCs in the BCM… | EV Diagnostics