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Cadillac U2220

to-Bumper coverage (Canada Base Warranty coverage), use the following la

DriveUnknown. Because verified GM information includes U2220 in a no-start/loss-of-propulsion diagnostic bulletin, arrange professional assessment if the code is current or the vehicle displays propulsion-related warnings or behavior.
ChargeUnknown. The supplied verified evidence does not establish whether charging is safe or unsafe with U2220.
ServiceContact a Cadillac dealer or qualified GM EV service facility. Tell them that U2220 is present and reference GM/NHTSA communications 23-NA-151 and PIT6044, as applicable to the vehicle.
Confidence95%

Quick answer

For the Cadillac LYRIQ, U2220 is included in official GM service communications covering no-start concerns or loss of propulsion. The supplied diagnostic title/meaning is truncated and does not establish a technical definition for U2220.

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 U2220 mean?

For the Cadillac LYRIQ, U2220 is included in official GM service communications covering no-start concerns or loss of propulsion. The supplied diagnostic title/meaning is truncated and does not establish a technical definition for U2220.

2. Technical explanation

Official GM communications submitted to NHTSA list U2220 among diagnostic trouble codes to verify during specified LYRIQ diagnostic procedures. Bulletin 23-NA-151 includes U2220 in a procedure for vehicles with a no-start concern or loss of propulsion. PIT6044 revisions instruct technicians to clear DTCs, program the K16 Battery Energy Control Module (BECM) in applicable procedures, and open a Technical Assistance Center (TAC) case if U2220 or listed companion codes return. The verified evidence does not establish a standalone component-level definition, root cause, or failure mechanism for U2220.

3. What system is affected?

The verified service information references the K16 Battery Energy Control Module (BECM) and the high-voltage battery surge tank during related LYRIQ procedures. A specific affected subsystem for U2220 alone is not yet established by verified evidence.

4. How serious is this code?

Unknown. However, U2220 is included in an official bulletin addressing no-start concern or loss of propulsion.

5. Symptoms you may notice

  • No-start concern or loss of propulsion is addressed by official Bulletin 23-NA-151 when U2220 is among the current DTCs verified.
  • Other symptoms are not yet established by verified evidence.

6. Possible causes

  • Not yet established by verified evidence for U2220 alone.

7. Can I still drive the vehicle?

Unknown. Because verified GM information includes U2220 in a no-start/loss-of-propulsion diagnostic bulletin, arrange professional assessment if the code is current or the vehicle displays propulsion-related warnings or behavior.

8. Can I charge the vehicle?

Unknown. The supplied verified evidence does not establish whether charging is safe or unsafe with U2220.

9. What you can safely do

  • Record whether U2220 is current or history and note any no-start or loss-of-propulsion condition.
  • Arrange diagnosis by a Cadillac/GM service facility qualified to perform the applicable EV repair procedures.
  • Do not attempt high-voltage battery, coolant-system, or BECM repairs yourself.

10. Step-by-step troubleshooting

  1. Official 23-NA-151 instructs qualified technicians to verify whether U2220 is current, along with other listed DTCs.
  2. The bulletin instructs qualified technicians to visually inspect and document coolant level in the high-voltage battery surge tank.
  3. PIT6044 revisions direct qualified technicians to use GDS2 to clear DTCs in the specified procedure and verify whether U2220 returns.
  4. Where applicable under PIT6044 revisions, GM directs programming of the K16 BECM according to Service Information, followed by the specified battery-negative-cable disconnection/connection procedure.
  5. If U2220 returns after the applicable procedure, GM directs the technician to start a TAC case and reference the applicable PIT6044 publication.

11. When to contact service

Contact a Cadillac dealer or qualified GM EV service facility. Tell them that U2220 is present and reference GM/NHTSA communications 23-NA-151 and PIT6044, as applicable to the vehicle.

12. What the service center may check

  • Verify whether U2220 is current or history, using the applicable GM diagnostic equipment and procedure.
  • Inspect and document high-voltage battery surge-tank coolant level where required by Bulletin 23-NA-151.
  • Perform the applicable GM BECM programming procedure where directed by PIT6044.
  • Verify whether U2220 returns after the applicable procedure.
  • Open a TAC case if U2220 returns, as directed in PIT6044 revisions.

13. Possible repair or resolution

  • GM PIT6044 revisions identify K16 BECM programming as part of the applicable service procedure.
  • If U2220 returns after the applicable procedure, GM directs a TAC case rather than providing a confirmed universal repair in the supplied evidence.
  • A final component replacement or repair resolution for U2220 alone is not yet established by verified evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • GM Bulletin 23-NA-151, published January 16, 2024: includes U2220 among DTCs to verify for specified LYRIQ no-start or loss-of-propulsion diagnostic procedures. https://static.nhtsa.gov/odi/tsbs/2024/MC-10249773-0001.pdf
  • GM PIT6044F, published December 1, 2023: includes U2220 in a return-code list and directs a TAC case if it returns after the applicable procedure. https://static.nhtsa.gov/odi/tsbs/2023/MC-10249261-9999.pdf
  • Earlier PIT6044 revisions and 23-NA-151 revisions in the supplied evidence also list U2220.

16. Recall information

  • No recall is established by the supplied verified evidence.

17. Official manufacturer information

Verified NHTSA-hosted GM manufacturer communications apply to 2023 Cadillac LYRIQ in the supplied applicability data; the applicability records also include a 2023–2024 LYRIQ US entry. Check the vehicle VIN with Cadillac or NHTSA for vehicle-specific campaign and warranty information.

19. Frequently asked questions

What does U2220 mean on a Cadillac LYRIQ?

The supplied diagnostic title and meaning are truncated and do not establish a technical definition. Verified GM documents show that U2220 is a code considered in specified LYRIQ diagnostic procedures.

Can U2220 be related to no start or loss of propulsion?

Yes. GM Bulletin 23-NA-151 includes U2220 among DTCs to verify in a procedure addressing no-start concern or loss of propulsion. The evidence does not establish that U2220 alone always causes either condition.

What does GM direct if U2220 returns after the applicable PIT6044 procedure?

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

Is there a recall for U2220?

No recall is established by the supplied verified evidence.

20. Sources & verification

Verified
Cadillac U2220: to-Bumper coverage (Canada Base Warranty coverage),… | EV Diagnostics