U1346 on Chevrolet vehicles
U1346 is named on 8 Chevrolet model years (2020–2026): 17 manufacturer filings and 0 owner reports in NHTSA’s files, across Suburban, Corvette, Tahoe, Equinox.
Which Chevrolet model years name U1346
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2024 Chevrolet Suburban | Electrical System | 4 | — |
| 2024 Chevrolet Tahoe | Engine | 2 | — |
| 2023 Chevrolet Suburban | Electrical System | 2 | — |
| 2023 Chevrolet Tahoe | Engine | 2 | — |
| 2022 Chevrolet Corvette | Electrical System | 2 | — |
| 2021 Chevrolet Corvette | Electrical System | 2 | — |
| 2020 Chevrolet Corvette | Electrical System | 2 | — |
| 2026 Chevrolet Equinox | Not specified | 1 | — |
A model year is listed because the code is named in its own record — a bulletin filed against it, or an owner’s complaint about it — not because every one of these vehicles sets it. Counts are documents in NHTSA’s files, not failure rates.
Chevrolet filings that name U1346
Source: NHTSA manufacturer communicationsBulletins and campaigns Chevrolet filed with NHTSA whose summary names U1346. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- 24-NA-158 Service bulletin2024-08-20 · Electrical System
- This technical bulletin provides a procedure to correct the condition of Malfunction Indicator Lamp Illuminated with Active DTC P0102 and Possibly U060F and U1346 at the Mass Air Flow Sensor.
- 24-NA-158 Service bulletin2024-09-13 · Electrical System
- This technical bulletin provides a procedure to correct the condition of Malfunction Indicator Lamp Illuminated with Active DTC P0102 and Possibly U060F and U1346 at the Mass Air Flow Sensor.
- PIE0681 Service bulletin2022-03-07 · Electrical System
- This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to the Service Engine Soon (SES) lamp illuminated on the driver information center (DIC) and DTC P0101, U060F and/or U1346 Set.
- PIE0681A Service bulletin2022-06-08 · Engine And Engine Cooling
- This engineering information (EI) closure ends the need for further information from the field in regards to the Service Engine Soon (SES) lamp illuminated on the driver information center (DIC) and DTC P0101, U060F and/or U1346 Set.
- PIP6109 Service bulletin2026-04-08 · Unknown Or Other
- This Preliminary information communicates the possibility of MIL with DTC set of U060F, U1346, and/or P0102.
What U1346 means
Source: SAE J2012 / OBD-IIU1346 is a manufacturer-specific code: the second character is a 1, which under the OBD-II standard hands the definition to whoever built the vehicle. The same code can mean one thing on a Ford and something unrelated on a Hyundai. Any site that prints a single definition for it is guessing.
A stored code names the test that failed, never the part that caused it. The record above is what Chevrolet and its owners have filed about it; the code’s page across every make has the whole file.
Common questions
Source: NHTSA files and the OBD-II standardIs U1346 a known problem on Chevrolet vehicles?
It is a documented one: NHTSA's files hold 17 manufacturer filings and 0 owner reports naming U1346 on 8 Chevrolet model years (2020–2026). Whether it is a problem on one particular car is a diagnosis, not a count — but a bulletin that names the code on your model year is the place to start.
Which Chevrolet models does U1346 appear on most?
2024 Suburban (4 documents), 2022 Corvette (2 documents), 2021 Corvette (2 documents).
Does U1346 on a Chevrolet mean it is recalled?
No. Recalls are filed by campaign and matched by VIN; no recall is triggered by a scan tool. Check the VIN at nhtsa.gov/recalls, or open the model year's page here for the campaigns filed against it.