U0146: owner reports and bulletins
Got U0146 on your scanner? Tell the mechanic your year, make, model and any symptoms and you'll get the likely cause and what to check first. Ask about this code.
What owners report to NHTSA
10 complaints filed with NHTSA mention U0146, 10 of them since 2015, across 5 different models. The component owners most often filed it under: service brakes.
Most-reported models
| Vehicle | Complaints | Model years reported |
|---|---|---|
| CHEVROLET SILVERADO 1500 | 4 | 2019, 2020 |
| GMC SIERRA 1500 | 3 | 2025 |
Manufacturer service bulletins that name U0146
19 technical service bulletins and manufacturer communications filed with NHTSA mention U0146, from 3 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:
- FORD BRONCO (2023), bulletin 10232483: Some 2023 F-150/Bronco customers may experience inoperative remote start and/or remote lock and unlock through the FordPass application. Diagnostic trouble codes (DTCs) U0146:09 may be stored in the telematics control un…
- FORD F-150 (2023), bulletin 10232492: Some 2023 F-150 Lightning vehicles built on or before 13-Dec-2022 may experience an inoperative FordPass application, inoperative remote start and/or inoperative remote lock and unlock that may be combined with diagnosti…
- FORD F-150 LIGHTNING BEV (2023), bulletin 10233598: Some 2023 F-150 Lightning vehicles built on or before 22-Dec-2022 and 2023 F-150 vehicles built on or before 28-Feb-2023 at Kansas City Assembly Plant or built on or before 07-Mar-2023 at Dearborn Truck Plant may experie…
- FORD F-550 SD (2023), bulletin 10233769: Some 2023 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. This may be due to the image pro…
- CHEVROLET SILVERADO 1500 (2019, 2020), bulletin 10176304: This Preliminary information communicates an issue with the engine wiring harness shorting at the left front cylinder head causing any of the following issues: -IPC gauges sweeping while driving -Several IPC warning mess…
- GMC SIERRA 1500 (2019, 2020), bulletin 10176304: This Preliminary information communicates an issue with the engine wiring harness shorting at the left front cylinder head causing any of the following issues: -IPC gauges sweeping while driving -Several IPC warning mess…
Sources: NHTSA Office of Defects Investigation complaint database and manufacturer communications file, snapshots September 2026. A complaint or bulletin that mentions a code is a report about that vehicle, not a statement that the code has one cause.