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Cadillac U222C

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

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceService evaluation is appropriate because the verified procedures involve BECM programming, specialized diagnostic equipment, and trained technicians. If U222C returns after the prescribed procedure, the applicable PIT6044 communication directs the technician to open a TAC case.
Confidence95%

Quick answer

U222C is listed in Cadillac service communications for the 2023–2024 LYRIQ. The supplied evidence does not establish a plain-language definition for this code. It is included in GM diagnostic procedures involving the Battery Energy Control Module (BECM); if it returns after the specified service process, the bulletin directs the technician to open a TAC case.

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 U222C mean?

U222C is listed in Cadillac service communications for the 2023–2024 LYRIQ. The supplied evidence does not establish a plain-language definition for this code. It is included in GM diagnostic procedures involving the Battery Energy Control Module (BECM); if it returns after the specified service process, the bulletin directs the technician to open a TAC case.

2. Technical explanation

The supplied official NHTSA-hosted GM communications list U222C among a group of current or history DTCs relevant to diagnostic procedures for the Cadillac LYRIQ. Bulletin 23-NA-151 includes U222C in a process that calls for verification of codes, documentation of high-voltage battery surge-tank coolant level, and observation of BECM parameters. PIT6044 revisions include U222C in a group of codes for which BECM programming is performed after specified preceding steps. The evidence does not establish the code’s specific subsystem fault definition.

3. What system is affected?

Battery Energy Control Module (BECM) is explicitly referenced in the supplied service communications. A more specific affected system for U222C is not yet established by verified evidence.

4. How serious is this code?

Not yet established by verified evidence.

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?

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 diagnosis by a Cadillac/GM service facility or appropriately trained EV technician.
  • Do not attempt high-voltage battery or BECM repairs yourself.

10. Step-by-step troubleshooting

  1. Verified service procedures require trained technicians and specified tools/equipment.
  2. For applicable LYRIQ procedures, technicians verify whether U222C and related DTCs are current or history.
  3. Bulletin 23-NA-151 instructs technicians to visually inspect and document coolant level in the high-voltage battery surge tank and record BECM parameters.
  4. PIT6044 revisions specify BECM programming for applicable MY23–24 Cadillac LYRIQ vehicles after the bulletin’s preceding diagnostic steps.
  5. If U222C returns after the prescribed process, PIT6044 directs the technician to start a TAC case and reference the PI.

11. When to contact service

Service evaluation is appropriate because the verified procedures involve BECM programming, specialized diagnostic equipment, and trained technicians. If U222C returns after the prescribed procedure, the applicable PIT6044 communication directs the technician to open a TAC case.

12. What the service center may check

  • Confirm whether U222C is current or history using the applicable GM diagnostic process.
  • Document high-voltage battery surge-tank coolant level where directed by bulletin 23-NA-151.
  • Record applicable K16 BECM parameters where directed by bulletin 23-NA-151.
  • Perform BECM programming only as outlined in GM Service Information and the applicable PIT6044 procedure.
  • Verify whether DTCs return after the specified procedure; if listed codes return, open a TAC case as directed.

13. Possible repair or resolution

  • BECM programming is identified in PIT6044 revisions for applicable 2023–2024 Cadillac LYRIQ vehicles after specified diagnostic steps.
  • The supplied evidence does not establish that BECM programming resolves every instance of U222C.
  • For returning U222C after the prescribed procedure, the verified direction is to open a TAC case.

14. Affected vehicles

15. Related TSBs / service bulletins

  • PIT6044F, published December 1, 2023 (NHTSA MC-10249261): Lists U222C; directs BECM programming for MY23–24 Cadillac LYRIQ after specified steps and TAC case escalation if listed codes return. https://static.nhtsa.gov/odi/tsbs/2023/MC-10249261-9999.pdf
  • 23-NA-151, published January 16, 2024 (NHTSA MC-10249773): Lists U222C among applicable DTCs and provides a diagnostic procedure involving high-voltage battery surge-tank coolant documentation and BECM parameters. https://static.nhtsa.gov/odi/tsbs/2024/MC-10249773-0001.pdf
  • Earlier supplied revisions include PIT6044 through PIT6044E and 23-NA-151 dated September 5, October 19, October 26, and October 30, 2023.

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Verified sources are NHTSA-hosted manufacturer communications from GM/Cadillac. Applicability supplied: Cadillac LYRIQ, 2023–2024 model years, US region. The record also separately lists 2023 LYRIQ US applicability.

19. Frequently asked questions

What does Cadillac U222C mean?

A specific plain-language definition is not yet established by the supplied verified evidence. It is listed in GM LYRIQ diagnostic communications involving the BECM.

Is U222C covered by a bulletin?

Yes. The supplied official communications include PIT6044 revisions and bulletin 23-NA-151, which list U222C for applicable Cadillac LYRIQ diagnostic procedures.

Can I clear U222C myself?

Not established by verified evidence. The verified procedures reference GDS2, BECM programming, GM Service Information, and trained technicians.

Does U222C require a BECM replacement?

Not yet established by verified evidence. The supplied communications identify BECM programming and TAC escalation if the code returns, not a confirmed BECM replacement.

20. Sources & verification

Verified
Cadillac U222C: to-Bumper coverage (Canada Base Warranty coverage),… | EV Diagnostics