Chevrolet U164F
Created On 12/12/2025 - Updated Labor Time 01/12/2026 - Updated DTC list
Quick answer
U164F is listed in Chevrolet bulletin PIT6457B as an additional keyword/DTC. The supplied verified evidence does not establish its fault definition, affected system, symptoms, driving or charging safety, diagnostic procedure, or repair.
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 U164F mean?
U164F is listed in Chevrolet bulletin PIT6457B as an additional keyword/DTC. The supplied verified evidence does not establish its fault definition, affected system, symptoms, driving or charging safety, diagnostic procedure, or repair.
2. Technical explanation
The verified source is NHTSA-posted Chevrolet manufacturer communication PIT6457B, published January 12, 2026. Its supplied evidence summary lists U164F among additional keywords/DTCs and notes that the bulletin’s DTC list was updated. The diagnostic record title and meaning contain bulletin revision text rather than a technical definition of U164F; therefore, a code meaning cannot be established from the provided evidence.
3. What system is affected?
Not yet established by verified evidence.
4. How serious is this code?
Unknown. The supplied diagnostic record marks 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 marks safe to drive as unknown.
8. Can I charge the vehicle?
Unknown. The supplied diagnostic record marks safe to charge as unknown.
9. What you can safely do
- Do not infer the meaning or urgency of U164F from the supplied record alone.
- Have a qualified Chevrolet service provider evaluate the stored code if diagnosis is needed.
10. Step-by-step troubleshooting
- No evidence-backed troubleshooting procedure was supplied.
- A qualified service provider can identify the vehicle configuration, retrieve diagnostic information, and consult the complete applicable Chevrolet bulletin and service information.
11. When to contact service
Service need is unknown in the supplied diagnostic record. Contact a Chevrolet dealer or qualified Chevrolet service provider for an evidence-based diagnosis, particularly if U164F is currently stored or accompanied by a vehicle message or malfunction.
12. What the service center may check
- Confirm whether PIT6457B applies to the specific vehicle.
- Review the complete PIT6457B communication and current Chevrolet service information.
- Retrieve and assess U164F and any accompanying diagnostic trouble codes.
13. Possible repair or resolution
- Not yet established by verified evidence.
14. Affected vehicles
- Chevrolet Blazer · 2023–2026 · US
- Chevrolet Bolt EUV · 2023–2026 · US
- Chevrolet Bolt EV · 2023–2026 · US
- Chevrolet Equinox · 2023–2026 · US
15. Related TSBs / service bulletins
- PIT6457B, NHTSA Manufacturer Communication PDF 11027686, published January 12, 2026. The supplied evidence lists U164F as an additional keyword/DTC and states that the DTC list was updated.
- Verified applicability supplied: 2023–2026 Chevrolet Blazer, Bolt EUV, Bolt EV, and Equinox in the United States.
16. Recall information
- No recall information was supplied or established by verified evidence.
17. Official manufacturer information
Official source supplied: NHTSA-hosted Chevrolet manufacturer communication PIT6457B (MC-11027686-0001): https://static.nhtsa.gov/odi/tsbs/2026/MC-11027686-0001.pdf
19. Frequently asked questions
What does Chevrolet code U164F mean?
Not yet established by verified evidence. The supplied record repeats bulletin revision text as the code title/meaning, while the official bulletin summary only lists U164F as an additional keyword/DTC.
Which vehicles are identified in the supplied applicability data?
2023–2026 Chevrolet Blazer, Bolt EUV, Bolt EV, and Equinox vehicles in the United States.
Is it safe to drive or charge with U164F?
Not yet established by verified evidence. Both driving and charging safety are marked unknown in the supplied diagnostic record.
Does PIT6457B establish a repair for U164F?
Not from the supplied evidence. The evidence summary identifies U164F in the bulletin’s additional keyword/DTC list but provides no repair instruction or resolution.