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Chevrolet U164E

: If symptom is related to a phone issue, please also make sure the customers phone is fully u

DriveNot yet established by verified evidence. The supplied record lists safe-to-drive status as unknown.
ChargeNot yet established by verified evidence. The supplied record lists safe-to-charge status as unknown.
ServiceService is appropriate when U164E is stored or the related radio/phone concern persists. The supplied record does not establish that service is universally required, but Chevrolet manufacturer communications provide diagnostic and software-update guidance.
Confidence95%

Quick answer

U164E is listed in Chevrolet radio-related manufacturer communications. Verified evidence says it can set because of a software anomaly; the applicable bulletin directs technicians not to replace the radio for this DTC and to follow the relevant software-update process where applicable.

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 U164E mean?

U164E is listed in Chevrolet radio-related manufacturer communications. Verified evidence says it can set because of a software anomaly; the applicable bulletin directs technicians not to replace the radio for this DTC and to follow the relevant software-update process where applicable.

2. Technical explanation

The supplied canonical text is incomplete and does not establish a full code definition. However, multiple NHTSA-posted Chevrolet manufacturer communications identify U164E among radio DTCs. PIT6393D/H/J/K/L states that certain listed DTCs, including U164E, may set due to a software anomaly. The bulletins also state not to replace the radio for these DTCs. A phone-related note in PIT6393D says that, if the symptom is related to a phone issue, the customer’s phone should be fully updated; the provided evidence truncates the remainder of that note.

3. What system is affected?

Radio/infotainment system, based on the Chevrolet manufacturer communication evidence.

4. How serious is this code?

Not yet established by verified evidence. The supplied record lists severity as unknown.

5. Symptoms you may notice

  • A phone-related symptom is referenced in PIT6393D, but the specific symptom is not established by the supplied evidence.
  • Not yet established by verified evidence.

6. Possible causes

  • A software anomaly is identified in Chevrolet PIT6393 bulletins as a reason U164E may set.
  • Not yet established by verified evidence beyond the documented software anomaly.

7. Can I still drive the vehicle?

Not yet established by verified evidence. The supplied record lists safe-to-drive status as unknown.

8. Can I charge the vehicle?

Not yet established by verified evidence. The supplied record lists safe-to-charge status as unknown.

9. What you can safely do

  • If the concern is phone-related, ensure the customer’s phone is fully updated, as referenced in PIT6393D.
  • Have a Chevrolet dealer or qualified service facility diagnose the stored DTC and check applicable software information.
  • Do not attempt high-voltage repair procedures; no high-voltage fault or repair procedure is established by the supplied evidence.

10. Step-by-step troubleshooting

  1. Confirm U164E with appropriate diagnostic equipment.
  2. For affected vehicles, a technician should consult the applicable Chevrolet/NHTSA manufacturer communication, including PIT6393 and, where applicable, 25-NA-085 or 25-NA-183.
  3. Where the bulletin applies, follow the specified radio software-update process. The supplied evidence cautions that USB software-update media must be used only for the intended vehicle/update process.
  4. Do not replace the radio solely because U164E is present when the applicable PIT6393 guidance applies.

11. When to contact service

Service is appropriate when U164E is stored or the related radio/phone concern persists. The supplied record does not establish that service is universally required, but Chevrolet manufacturer communications provide diagnostic and software-update guidance.

12. What the service center may check

  • Verify whether U164E is present with other listed radio DTCs.
  • Determine whether the vehicle is included in Chevrolet bulletin applicability, including 25-NA-085 or 25-NA-183 where referenced by PIT6393K/L.
  • Check for the applicable radio software update.
  • For phone-related concerns, confirm the phone is fully updated.
  • Do not replace the radio for U164E when the applicable PIT6393 bulletin guidance applies.

13. Possible repair or resolution

  • Applicable Chevrolet guidance identifies a radio software update as the documented resolution path where required.
  • Radio replacement is specifically not recommended solely for the listed DTCs, including U164E, under applicable PIT6393 guidance.
  • Not yet established by verified evidence whether a software update resolves every U164E occurrence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • PIT6393L, NHTSA MC-11032781-0001, published 2026-05-14: Lists U164E among DTCs; references software-update guidance and applicability involving 25-NA-085 or 25-NA-183.
  • PIT6393K, NHTSA MC-11032554-0001, published 2026-04-28: Lists U164E among DTCs; references software-update guidance and applicability involving 25-NA-085 or 25-NA-183.
  • PIT6393J, NHTSA MC-11029962-0001, published 2026-03-06: States listed DTCs including U164E may set due to a software anomaly and directs technicians not to replace the radio for them.
  • PIT6457B, NHTSA MC-11027686-0001, published 2026-01-12: Lists U164E among radio-related DTC keywords.
  • PIT6393H, NHTSA MC-11026861-0001, published 2025-12-23: States listed DTCs including U164E may set due to a software anomaly and directs technicians not to replace the radio for them.
  • PIT6393F, NHTSA MC-11024704-0001, published 2025-10-23: States listed DTCs including U164E may set due to a software anomaly and directs technicians not to replace the radio for them.
  • PIT6393E, NHTSA MC-11024438-0001, published 2025-10-04: States listed DTCs including U164E may set due to a software anomaly and directs technicians not to replace the radio for them.
  • PIT6393D, NHTSA MC-11023907-0001, published 2025-10-01: States listed DTCs including U164E may set due to a software anomaly; includes the phone-update note for phone-related symptoms.

16. Recall information

  • Not yet established by verified evidence. No recall information was supplied.

17. Official manufacturer information

Official NHTSA-posted Chevrolet manufacturer communications: PIT6393L (https://static.nhtsa.gov/odi/tsbs/2026/MC-11032781-0001.pdf), PIT6393K (https://static.nhtsa.gov/odi/tsbs/2026/MC-11032554-0001.pdf), PIT6393J (https://static.nhtsa.gov/odi/tsbs/2026/MC-11029962-0001.pdf), PIT6457B (https://static.nhtsa.gov/odi/tsbs/2026/MC-11027686-0001.pdf), PIT6393H (https://static.nhtsa.gov/odi/tsbs/2025/MC-11026861-0001.pdf), PIT6393F (https://static.nhtsa.gov/odi/tsbs/2025/MC-11024704-0001.pdf), PIT6393E (https://static.nhtsa.gov/odi/tsbs/2025/MC-11024438-0001.pdf), and PIT6393D (https://static.nhtsa.gov/odi/tsbs/2025/MC-11023907-0001.pdf). Verified applicability supplied: US Chevrolet Blazer, Bolt EV, Bolt EUV, and Equinox, model years 2023–2026. Equinox is also separately listed for 2024–2026.

19. Frequently asked questions

What does Chevrolet U164E mean?

The supplied canonical description is incomplete, so a full definition is not established. Verified Chevrolet communications identify U164E as a radio-related DTC and state that it can set due to a software anomaly.

Should the radio be replaced for U164E?

No, not when the applicable PIT6393 bulletin guidance applies. The supplied Chevrolet communications explicitly direct technicians not to replace the radio for the listed DTCs, including U164E.

What should be checked for a phone-related concern?

PIT6393D says to make sure the customer’s phone is fully updated when the symptom is related to a phone issue. The remainder of the note is truncated in the supplied evidence.

Is U164E safe to drive or charge with?

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

20. Sources & verification

Verified
Chevrolet U164E: : If symptom is related to a phone issue, please also… | EV Diagnostics