U023A 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.

Owners’ own words, scrubbed of anything identifying. Unverified reports filed with NHTSA — what was said, not a finding that it was true.

Bulletins and campaigns Ford filed with NHTSA whose summary names U023A. Quote the document number at the service desk — it is a diagnosis the maker has already written down.

• SSM 52078 Service bulletin
  2023-11-20 · Electrical System — Software
• Some 2021-2023 F-150 vehicles may exhibit DTC U023A:08 after reprogramming the SCCM. Do not replace or reprogram the SCCM, image processing module A (IPMA) or their components for this condition at this time. This DTC does not alert the customer, will not affect vehicle durability and no additional diagnosis or service is required for this condition at this time. Engineering is currently working o
• SSM 52224 Service bulletin
  2024-01-31 · Equipment Adaptive/Mobility — Vehicle Controls — Steering
• Some 2021-2023 F-150 vehicles may exhibit DTC U023A:08 after reprogramming the SCCM. Do not replace or reprogram the SCCM, image processing module A (IPMA) or their components for this condition at this time. This DTC does not alert the customer, will not affect vehicle durability or vehicle operation and no additional diagnosis or service is required for this condition at this time. Engineering i
• SSM 52914 Service bulletin
  2024-09-19 · Unknown Or Other
• Some 2021-2023 F-150 Raptor/Tremor vehicles may exhibit diagnostic trouble code (DTC) U023A:08 after reprogramming the SCCM.
• 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 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
• 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 52077 Service bulletin
  2023-11-17 · Forward Collision Avoidance
• Some 2024 Mustang vehicles may exhibit a Pre-Collision Assist Not Available message and a Pre-Collision Assist Not Available indicator displayed in the IPC with DTC U023A stored in the steering column control module (SCCM) after the vehicle is remote started. The message and indicator should go away and normal operation of the pre-collision system should resume once the vehicle is shut down and th

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.