U0285: owner reports and bulletins

Network / communication. We haven't written the explanation for this code yet. Below is what owners and manufacturers have filed with NHTSA.

Got U0285 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

1 complaints filed with NHTSA mention U0285, 1 of them since 2015, across 1 different models. The component owners most often filed it under: electrical system.

Manufacturer service bulletins that name U0285

3 technical service bulletins and manufacturer communications filed with NHTSA mention U0285, from 1 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:

  • FORD F-150 (2021, 2022), bulletin 10211723: Some 2021-2022 F-150 vehicles equipped with a 2.7L EcoBoost engine may experience a Check Charging System message displayed in the instrument panel cluster (IPC). The following diagnostic trouble codes (DTCs) may also be…
  • FORD BRONCO (2022), bulletin 10214827: Some 2022 Broncos equipped with a 2.3L engine and built on 01-Apr-2022 and through 08-Apr-2022 may exhibit a charging system fault message displayed in the IPC and diagnostic trouble codes (DTCs) U012D, U0284 and/or U028…

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.