U0111: 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 U0111 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

9 complaints filed with NHTSA mention U0111, 8 of them since 2015, across 8 different models. The component owners most often filed it under: electrical system.

Manufacturer service bulletins that name U0111

23 technical service bulletins and manufacturer communications filed with NHTSA mention U0111, from 4 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:

  • JEEP WRANGLER (2019, 2020, 2021, 2022), bulletin 10225223: U0111-00 Lost Communication With Battery Energy Control Module Set In The HCP. BPCM Offline, Multiple Low Voltage DTC?s.
  • LAND ROVER RANGE ROVER (2019, 2020, 2021, 2022), bulletin 11001164: Malfunction indicator lamp (MIL) displayed on the instrument cluster. Malfunction Indicator Lamp (MIL) might be illuminated with code U0111- 00, loss of start/stop functionality and no communication during diagnostic ses…
  • LAND ROVER DISCOVERY SPORT (2020, 2021, 2022, 2019), bulletin 11001165: On certain 48V Mild Hybrid Electric Vehicle (MHEV) battery enters an offline state and no longer communicates or functions as intended. Malfunction Indicator Lamp (MIL) might be illuminated with code U0111- 00, loss of s…
  • LAND ROVER RANGE ROVER EVOQUE (2019, 2020, 2021, 2022), bulletin 11001167: On certain 48V Mild Hybrid Electric Vehicle (MHEV) battery enters an offline state and no longer communicates or functions as intended. Malfunction Indicator Lamp (MIL) might be illuminated with code U0111- 00, loss of s…
  • LAND ROVER RANGE ROVER SPORT (2019, 2020, 2021), bulletin 10185162: PCM U0111-00 Lost Communication With Battery Energy Control Module "A" after update
  • CHRYSLER PACIFICA (2019), bulletin 10187119: Flash: Hybrid Control Processor (HCP) and Auxiliary Hybrid Control Processor (AHCP) Updates This bulletin involves reprogramming the HCP and AHCP or also known as Power Inverter Module (PIM) with the latest available sof…

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.