U0146 on Ford vehicles

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.

Bulletins and campaigns Ford filed with NHTSA whose summary names U0146. Quote the document number at the service desk — it is a diagnosis the maker has already written down.

• SSM 51486 Service bulletin
  2023-03-24 · Back Over Prevention
• 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 processing module A (IPMA) not communicating on the controller area network (CAN) during the remote starting event. Replacement or reprogramming of the ABS module or IPMA will not res
• SSM 53521 Service bulletin
  2025-03-25 · 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.
• SSM 53892 Service bulletin
  2025-06-11 · 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 51389 Service bulletin
  2023-02-27 · Electrical System — Ignition — Anti-Theft — Immobilizer/Proximity — Key/Sender
• 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 unit (TCU), and U2402:00 and/or U2402:92 may be stored in the gateway module (GWM). Inform the customer they can continue to drive the vehicle. A solution is planned for deployment v
• TSB 23-2108 Service bulletin
  2023-03-31 · 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.
• SSM 51431 Service bulletin
  2023-03-10 · Electrical System — Starter Assembly
• Some 2023 F-150 vehicles built on or before 28-Feb-2023 at Kansas City Assembly Plant or 07-Mar-2023 at Dearborn Truck Plant, 2023 F-150 Lightning vehicles built on or before 13-Dec-2022, and 2023 Bronco vehicles may experience inoperative remote start and/or remote lock and unlock through FordPass. Diagnostic trouble codes (DTCs) U0146:09 may be stored in the telematics control unit (TCU), and U2
• SSM 54160 Service bulletin
  2025-08-22 · 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
• TSB 23-2104 Service bulletin
  2023-03-29 · Back Over Prevention — Software
• 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 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
• 23B21 Service bulletin
  2023-03-29 · Equipment — Electrical
• Certain 2023 Model Year F-150 Lightning Gateway Module Programing In all of the affected vehicles, the Gateway Module (GWM) may lose internet connection. This may cause the vehicle to experience an inoperative FordPass application (inability to review the vehicle's state of charge, inoperative remote start and/or inoperative remote lock and unlock). This may be combined with diagnostic trouble co
• SSM 54420 Service bulletin
  2025-12-03 · 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 bulletin
  2025-11-04 · Service Brakes
• 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

A stored code names the test that failed, never the part that caused it. The record above is what Ford and its owners have filed about it; the code’s page across every make has the whole file.