U1011: 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 U1011 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 U1011, 10 of them since 2015, across 3 different models. The component owners most often filed it under: electrical system.

Most-reported models

VehicleComplaintsModel years reported
FORD MAVERICK HYBRID82022, 2023

Manufacturer service bulletins that name U1011

1 technical service bulletins and manufacturer communications filed with NHTSA mention U1011, from 1 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:

  • FORD MUSTANG MACH E (2021), bulletin 10200736: Some 2021 Mustang Mach-E vehicles built on or before 20-Mar-2021 may exhibit a loss of power, Stop Safely Now message in the instrument panel cluster (IPC), and illuminated malfunction indicator lamp (MIL) with diagnosti…

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.