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Cadillac U3635

U3620, U3622, U3624, U3626

DriveUnknown. The supplied diagnostic record lists safe-to-drive status as unknown.
ChargeUnknown. The supplied diagnostic record lists safe-to-charge status as unknown.
ServiceService need is unknown in the supplied diagnostic record. Seek Cadillac service evaluation if the code is present or the vehicle displays warnings; the supplied evidence does not establish a specific repair action for U3635.
Confidence95%

Quick answer

For a 2023–2024 Cadillac LYRIQ in the US, U3635 is not established by the supplied verified evidence as a current applicable code for PIE0788C. The bulletin revision dated June 10, 2024 removed U3635 from its listed DTCs.

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 U3635 mean?

For a 2023–2024 Cadillac LYRIQ in the US, U3635 is not established by the supplied verified evidence as a current applicable code for PIE0788C. The bulletin revision dated June 10, 2024 removed U3635 from its listed DTCs.

2. Technical explanation

The supplied diagnostic record labels U3635 with the canonical title/meaning “U3620, U3622, U3624, U3626,” but does not provide a technical definition of U3635 or an underlying fault description. NHTSA-hosted manufacturer communications PIE0788B and PIE0788C state that U3635 was removed from the bulletin’s DTC list in the June 10, 2024 revision. PIE0788B identifies U3620, U3622, U3624, and U3626 as additional keywords. No further code-specific diagnostic interpretation is established by the supplied verified evidence.

3. What system is affected?

Not yet established by verified evidence.

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

  • Use the vehicle owner information and any active vehicle warnings to guide immediate operation decisions.
  • Have a Cadillac dealer or qualified service provider evaluate stored diagnostic information if U3635 is present.
  • Do not attempt high-voltage diagnosis or repair based on this information.

10. Step-by-step troubleshooting

  1. No code-specific troubleshooting procedure is established by the supplied verified evidence.
  2. A service provider can confirm the stored DTCs and determine whether another current Cadillac diagnostic procedure applies.

11. When to contact service

Service need is unknown in the supplied diagnostic record. Seek Cadillac service evaluation if the code is present or the vehicle displays warnings; the supplied evidence does not establish a specific repair action for U3635.

12. What the service center may check

  • Confirm the vehicle is a US-market 2023–2024 Cadillac LYRIQ, the applicability range supported by the supplied record.
  • Confirm the exact stored DTC and any accompanying codes using approved diagnostic equipment.
  • Review the current applicable Cadillac service information, because the supplied evidence shows U3635 was removed from PIE0788 on June 10, 2024.

13. Possible repair or resolution

  • Not yet established by verified evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • NHTSA Manufacturer Communication PDF 11004345, PIE0788B, published June 10, 2024: the evidence summary states that U3635 was removed from the bulletin’s DTC list and identifies U3620, U3622, U3624, and U3626 as additional keywords.
  • NHTSA Manufacturer Communication PDF 11004943, PIE0788C, published June 28, 2024: the evidence summary states that U3635 was removed from the bulletin’s DTC list in the June 10, 2024 revision.
  • The supplied evidence does not establish that either communication provides a repair procedure for U3635.

16. Recall information

  • No recall information was supplied or established by verified evidence.

17. Official manufacturer information

Applicable vehicle range in the supplied record: Cadillac LYRIQ, model years 2023–2024, US. Official NHTSA-hosted manufacturer communications: PIE0788B (https://static.nhtsa.gov/odi/tsbs/2024/MC-11004345-0001.pdf) and PIE0788C (https://static.nhtsa.gov/odi/tsbs/2024/MC-11004943-0001.pdf).

19. Frequently asked questions

What does U3635 mean on a Cadillac LYRIQ?

The supplied verified evidence does not provide a technical definition for U3635. The diagnostic record associates it with “U3620, U3622, U3624, U3626,” but does not explain the fault meaning.

Does PIE0788 apply to U3635?

The supplied NHTSA-hosted evidence states that U3635 was removed from PIE0788’s DTC list in the June 10, 2024 revision. Therefore, current applicability of PIE0788 to U3635 is not established by the supplied evidence.

Can I drive or charge with U3635?

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

20. Sources & verification

Verified
Cadillac U3635: U3620, U3622, U3624, U3626 | EV Diagnostics