U0146
1 owner report and 50 manufacturer filings across 16 model years from Chevrolet, Ford.
Where U0146 shows up
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports | Parts |
|---|---|---|---|---|
| 2023 Ford F-250 Super Duty | Service Brakes | 5 | — | Brake pads → |
| 2023 Ford F-350 Super Duty | Service Brakes | 5 | — | Brake pads → |
| 2023 Ford F-450 Super Duty | Service Brakes | 5 | — | Brake pads → |
| 2023 Ford Bronco | Electrical System | 4 | — | Battery → |
| 2025 Ford F-250 Super Duty | Service Brakes | 4 | — | Brake pads → |
| 2024 Ford F-250 Super Duty | Service Brakes | 4 | — | Brake pads → |
| 2025 Ford F-350 Super Duty | Service Brakes | 4 | — | Brake pads → |
| 2024 Ford F-350 Super Duty | Service Brakes | 4 | — | Brake pads → |
| 2025 Ford F-450 Super Duty | Service Brakes | 4 | — | Brake pads → |
| 2024 Ford F-450 Super Duty | Service Brakes | 4 | — | Brake pads → |
| 2023 Ford F-150 Lightning | Back Over Prevention | 3 | — | |
| 2023 Chevrolet Malibu | Power Train | — | 1 | |
| 2026 Ford F-250 Super Duty | Service Brakes | 1 | — | Brake pads → |
| 2026 Ford F-350 Super Duty | Service Brakes | 1 | — | Brake pads → |
| 2026 Ford F-450 Super Duty | Service Brakes | 1 | — | Brake pads → |
| 2025 Ford Transit | Not specified | 1 | — |
A model year appears here because the code is named in its record, not because every one of these vehicles sets it. Counts are mentions in the federal files, not failure rates — nobody publishes the denominator.
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U0146 by make
The same record, one make at a time: the model years, bulletins and owner reports that name U0146 on that maker’s vehicles.
What it gets filed under
What owners said
Source: NHTSA complaint databaseOwners’ own words, one per nameplate, scrubbed of anything identifying. These are unverified reports filed with NHTSA — they are what was said, not a finding that it was true.
The diagnostic machine retrieved DTC: U0073, P0700, P25A2, U0101,U0129,U0146, U18D5, U18D7, U2413, U0073-00, U0100-00, U0140-00, U0151-00, U026A-00, U0420-00 and U0100
50 manufacturer filings name U0146. Start with what the maker wrote down.
A code names the test that failed, not the part. A bulletin that names it is often a diagnosis someone has already written down — quote its number at the service desk.
Manufacturer filings that name it
Source: NHTSA manufacturer communicationsService bulletins and campaigns whose filed summary names U0146.
- SSM 54420 Service bulletin2025-12-03 · Service Brakes
- Some 2023-2026 F-Super Duty vehicles built on or before 01-Oct-2025 may exhibit a "Hill Start Assist Unavailable" and/or "Parking Brake Limited Function" message at vehicle start-up with diagnostic trouble codes (DTCs) U0151, U023A, U0159 and/or U0146 stored in the anti-lock brake system (ABS) module. These DTCs and/or U0415 may also be present in various other modules related to "invalid data rec
- SSM 54351 Service bulletin2025-11-04 · Unknown Or Other
- Some 2022-2024 Expedition/Navigator vehicles equipped with driver assistance features and minor feature codes DBCBB and DBCBC may exhibit driver assistance feature warning messages displayed in the instrument panel cluster (IPC). Additionally, some modules may store invalid data/lost communication related diagnostic trouble codes (DTCs). The image processing module A (IPMA) should not store these
- SSM 54160 Service bulletin2025-08-22 · Service Brakes
- Some 2023-2025 F-Super Duty vehicles may exhibit a "Hill Start Assist Unavailable" and/or "Parking Brake Limited Function" message at vehicle start-up with diagnostic trouble codes (DTCs) U0151, U023A, U0159, and/or U0146 stored in the anti-lock brake system (ABS) module. These DTCs and/or U0415 may also be present in various other modules related to "invalid data received from the ABS control mod
- SSM 53892 Service bulletin2025-06-11 · Service Brakes
- Some 2023-2025 F-Super Duty vehicles may exhibit a "Hill Start Assist Unavailable" and/or "Parking Brake Limited Function" message at vehicle start-up with diagnostic trouble codes (DTC) U0151, U023A, U0159, and/or U0146 stored in the anti-lock brake system (ABS) module. These DTCs and/or U0415 may also be present in various other modules related to "invalid data received from the ABS control modu
- SSM 53521 Service bulletin2025-03-25 · Unknown Or Other
- Some 2023-2025 F-Super Duty vehicles may set diagnostic trouble codes (DTCS) U023A:00, U0159:00, and/or U0146:00 in the anti-lock brake system (ABS) module after the vehicle is remote started.
- TSB 23-2108 Service bulletin2023-03-31 · Back Over Prevention — Software
- Some 2023 Bronco vehicles built on or before 16-Mar-2023 may experience an inoperative FordPass application, inoperative remote start and/or inoperative remote lock and unlock that may be combined with diagnostic trouble codes (DTC) U0146:09 stored in the telematics control unit (TCU) and U2402:00 and/or U2402:92 stored in the gateway module (GWM). This may be due to the software level in the GWM.
What U0146 means
Source: SAE J2012 / OBD-IIU0146 sits in the generic range of the OBD-II standard, so it means the same thing on every vehicle sold in the United States — but WhichTrim does not carry a definition for it and will not invent one. What is on this page is the record: who named it and on what.
A stored code names the test that failed, never the part that caused it. It is the starting point of a diagnosis, not its conclusion — the same code has several possible causes and the cheap one is not always right.
Common questions about U0146
Source: NHTSA files and the OBD-II standardCan I keep driving with U0146 stored?
Nobody can answer that from the code alone, and a site that does is guessing. A steady light means a fault was logged and the car should be checked soon; a flashing light means a severe misfire — slow down and get it seen as soon as possible, because severe misfire can quickly damage the catalytic converter. The safe read of this page is the mileage and the components, not permission.
Does a code mean the car is recalled?
No. Recalls are filed by campaign and matched by VIN, and none of them are triggered by a scan tool. If you want to know whether an open recall applies to one specific vehicle, check the VIN at nhtsa.gov/recalls — that is the only source that settles it.
Why do the counts here differ from other sites?
Because these are not estimates. Every number on this page is a count of documents in NHTSA's own files: manufacturer communications that name the code in their filed summary, and owner complaints that name it in the narrative. We do not model, weight or extrapolate them.
Will clearing the code fix it?
Clearing turns the light off and erases the freeze-frame data a technician would have used to work out what happened. If the condition is still there the code returns, usually within a few drive cycles, and the diagnosis now starts from less information than before.