EV Diagnostics
Verified EV diagnostic knowledge page

Cadillac U222D

to-Bumper coverage (Canada Base Warranty coverage), use the following labor operation. Reference the Applicable Warranties section of Investigate Vehicle History (

DriveUnknown. The supplied diagnostic record lists safe-to-drive status as unknown.
ChargeUnknown. The supplied diagnostic record lists safe-to-charge status as unknown.
ServiceContact a Cadillac dealer or qualified GM EV service facility. If U222D returns after the applicable PIT6044 process, the official communication directs the technician to start a TAC case.
Confidence95%

Quick answer

U222D is listed in official GM service communications for the 2023–2024 Cadillac LYRIQ. The supplied database does not establish a plain-language definition for U222D, driving or charging safety, or a specific owner-observable symptom.

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 U222D mean?

U222D is listed in official GM service communications for the 2023–2024 Cadillac LYRIQ. The supplied database does not establish a plain-language definition for U222D, driving or charging safety, or a specific owner-observable symptom.

2. Technical explanation

The supplied canonical title/meaning appears to be truncated warranty text and is not a usable diagnostic definition. Official GM communications identify U222D as one of several DTCs addressed in LYRIQ service procedures. In PIT6044 revisions, if U222D returns after the bulletin’s diagnostic/programming process, GM instructs technicians to open a Technical Assistance Center (TAC) case and reference the publication. Bulletin 23-NA-151 also includes U222D among DTCs to verify during its procedure.

3. What system is affected?

Not yet established by verified evidence. The cited service information references the K16 Battery Energy Control Module (BECM) and high-voltage battery surge-tank coolant checks as part of procedures covering U222D, but the evidence does not establish that U222D alone identifies a BECM or coolant-system fault.

4. How serious is this code?

Unknown. The supplied diagnostic record lists severity as unknown.

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. The supplied diagnostic record lists safe-to-drive status as unknown.

8. Can I charge the vehicle?

Unknown. The supplied diagnostic record lists safe-to-charge status as unknown.

9. What you can safely do

  • Arrange diagnosis by a Cadillac/GM-qualified service facility.
  • Provide the stored DTC and any warning messages to the service advisor.
  • Do not attempt high-voltage battery, Battery Energy Control Module, or battery-cable service yourself.

10. Step-by-step troubleshooting

  1. A qualified technician may verify whether U222D is current or history, consistent with bulletin 23-NA-151.
  2. For applicable PIT6044 procedures, GM directs technicians to verify whether listed DTCs return after its specified process; if U222D returns, open a TAC case and reference the publication.
  3. The supplied evidence references BECM programming and a battery-negative-cable disconnection/connection procedure in Service Information. These are professional service procedures, not owner repair steps.

11. When to contact service

Contact a Cadillac dealer or qualified GM EV service facility. If U222D returns after the applicable PIT6044 process, the official communication directs the technician to start a TAC case.

12. What the service center may check

  • Verify whether U222D is current or history, as applicable to bulletin 23-NA-151.
  • For the 23-NA-151 procedure, visually inspect and document the high-voltage battery surge-tank coolant level and record specified BECM parameters.
  • For applicable PIT6044 revisions, clear DTCs using GDS2 after the bulletin’s specified steps and determine whether U222D returns.
  • If U222D returns in the PIT6044 process, start a TAC case and reference PIT6044.

13. Possible repair or resolution

  • The verified communications reference BECM programming as part of applicable PIT6044 procedures.
  • The verified communications require a TAC case if U222D returns after the applicable PIT6044 process.
  • A final repair for an individual vehicle is not established by the supplied evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • PIT6044F, published December 1, 2023: Includes U222D among DTCs that, if returned after the described procedure, require a TAC case.
  • PIT6044E, published October 30, 2023: Includes U222D in the same return-and-TAC-case instruction.
  • PIT6044D, published October 26, 2023: References U222D and BECM programming for MY23–24 Cadillac LYRIQ.
  • 23-NA-151, published January 16, 2024: Includes U222D among DTCs to verify during its service procedure.
  • Earlier supplied revisions also include PIT6044, PIT6044A, 23-NA-151 dated September 5, 2023, and 23-NA-151 dated October 19, 2023.

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Applicable verified vehicle coverage is Cadillac LYRIQ model years 2023–2024 in the US. Official NHTSA-hosted GM communications include PIT6044F (https://static.nhtsa.gov/odi/tsbs/2023/MC-10249261-9999.pdf) and 23-NA-151 (https://static.nhtsa.gov/odi/tsbs/2024/MC-10249773-0001.pdf).

19. Frequently asked questions

What does U222D mean?

Not yet established by verified evidence. The supplied canonical meaning is truncated warranty language rather than a diagnostic definition.

Does U222D apply to a Cadillac LYRIQ?

Verified applicability lists the 2023–2024 Cadillac LYRIQ in the US. The cited GM service communications also reference MY23–24 LYRIQ.

Can I keep driving or charging with U222D?

Not yet established by verified evidence. Both safe-to-drive and safe-to-charge statuses are recorded as unknown.

What does GM instruct if U222D returns?

In applicable PIT6044 revisions, GM directs the technician to start a TAC case and reference the publication.

20. Sources & verification

Verified
Cadillac U222D: to-Bumper coverage (Canada Base Warranty coverage),… | EV Diagnostics