U1110: 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 U1110 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

14 complaints filed with NHTSA mention U1110, 13 of them since 2015, across 11 different models. The component owners most often filed it under: electrical system.

Manufacturer service bulletins that name U1110

6 technical service bulletins and manufacturer communications filed with NHTSA mention U1110, from 3 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:

  • DODGE CHALLENGER (2021), bulletin 10222994: Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further inves…
  • DODGE CHARGER (2021), bulletin 10222992: Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further inves…
  • CHRYSLER 300 (2021), bulletin 10222991: Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further inves…
  • TOYOTA RAV4 HYBRID (2017, 2016, 2018, 2019), bulletin 10173804: TSB: SUPERSESSION NOTICE The information contained in this bulletin supersedes Service Bulletin No. T-SB-0003-19. ?The Introduction and Software Update Information sections have been updated. Service Bulletin No. T-SB-00…
  • TOYOTA CAMRY (2016, 2017, 2018), bulletin 10153263: TSB: SUPERSESSION NOTICE The information contained in this bulletin supersedes Service Bulletin No. T-SB-0234-17. ? The Introduction and Software Update Procedure sections have been updated. Service Bulletin No. T-SB-023…

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.