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Cadillac U0140

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

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceContact a Cadillac dealer for diagnosis. The supplied manufacturer communication directs dealers to verify the concern and, for the listed DTCs including U0140 symptom 00, wait for an engineering resolution rather than replace the controller.
Confidence95%

Quick answer

For a 2023 Cadillac LYRIQ in the US, U0140 symptom 00 is listed in Cadillac preliminary information PIC6500A. Dealers are instructed to verify the customer concern and wait for an engineering resolution; if this code is present in the bulletin’s listed group, they are instructed not to replace the controller.

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 U0140 mean?

For a 2023 Cadillac LYRIQ in the US, U0140 symptom 00 is listed in Cadillac preliminary information PIC6500A. Dealers are instructed to verify the customer concern and wait for an engineering resolution; if this code is present in the bulletin’s listed group, they are instructed not to replace the controller.

2. Technical explanation

The supplied official NHTSA manufacturer communication identifies U0140 symptom 00 as one of several DTCs covered by PIC6500A. The communication states that, when one of the listed DTCs sets, the dealer should not replace the controller. If none of the listed DTCs are present, normal SI Diagnostics should be followed. The supplied evidence does not establish the underlying fault meaning of U0140, a specific failed component, or a final repair.

3. What system is affected?

Not yet established by verified evidence.

4. How serious is this code?

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

5. Symptoms you may notice

  • The dealer is instructed to verify the customer concern, but the supplied evidence does not identify the specific customer symptoms associated with U0140 symptom 00.

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 with a Cadillac dealer or qualified service facility.
  • Provide the stored code, including symptom 00 if shown by the scan tool, and reference PIC6500A.
  • Do not authorize controller replacement solely because U0140 symptom 00 is present under the circumstances addressed by PIC6500A.

10. Step-by-step troubleshooting

  1. A dealer should verify the customer concern.
  2. If U0140 symptom 00 is among the DTCs setting, PIC6500A instructs the dealer to wait until engineering provides a resolution and not replace the controller.
  3. If none of the DTCs listed in PIC6500A are setting, follow normal SI Diagnostics.

11. When to contact service

Contact a Cadillac dealer for diagnosis. The supplied manufacturer communication directs dealers to verify the concern and, for the listed DTCs including U0140 symptom 00, wait for an engineering resolution rather than replace the controller.

12. What the service center may check

  • Verify the customer concern.
  • Confirm whether U0140 symptom 00 is setting.
  • Check whether any other DTCs listed in PIC6500A are setting.
  • Follow the instruction in PIC6500A not to replace the controller when a listed DTC is present.
  • If no listed DTC is present, follow normal SI Diagnostics.

13. Possible repair or resolution

  • As of the supplied communication, engineering resolution was pending.
  • The communication states that the preliminary information would be converted to a bulletin when a resolution became available.
  • Controller replacement is specifically not directed when U0140 symptom 00 is among the listed setting DTCs.

14. Affected vehicles

15. Related TSBs / service bulletins

  • PIC6500A, published May 24, 2023, is an official NHTSA-posted Cadillac manufacturer communication. It applies in the supplied data to the 2023 Cadillac LYRIQ in the US and lists U0140 symptom 00. Source: https://static.nhtsa.gov/odi/tsbs/2023/MC-10237683-9999.pdf

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Official source: NHTSA Manufacturer Communication PDF 10237683, Cadillac PIC6500A, published May 24, 2023: https://static.nhtsa.gov/odi/tsbs/2023/MC-10237683-9999.pdf

19. Frequently asked questions

What does U0140 mean for the 2023 Cadillac LYRIQ?

The supplied evidence does not establish a fault-definition meaning. It establishes only that U0140 symptom 00 is included in Cadillac PIC6500A.

Should the controller be replaced for U0140 symptom 00?

No. PIC6500A states that if any listed DTC, including U0140 symptom 00, is setting, the controller should not be replaced.

Is there a final repair available?

Not yet established by verified evidence. PIC6500A states that engineering resolution was pending when the communication was issued.

Can the vehicle be driven or charged?

Not yet established by verified evidence.

20. Sources & verification

ReferenceVerified
Cadillac U0140: to-Bumper coverage (Canada Base Warranty coverage),… | EV Diagnostics