U0102: 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 U0102 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

6 complaints filed with NHTSA mention U0102, 6 of them since 2015, across 4 different models. The component owners most often filed it under: electrical system.

Manufacturer service bulletins that name U0102

40 technical service bulletins and manufacturer communications filed with NHTSA mention U0102, from 10 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:

  • RAM 1500 (2021), bulletin 10190705: Flash: Hybrid Control Processor (HCP) Updates This bulletin involves updating the HCP with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigati…
  • JEEP GRAND CHEROKEE (2021), bulletin 10212465: DTC U0159-00, U015C-00, U0102-00, and/or U1070-00 Set In The BSCM
  • 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…
  • CADILLAC ESCALADE (2017, 2018, 2019, 2020), bulletin 10173683: This Preliminary information communicates a customer concern ofIPC gauges inoperative or fluctuate, No Start,No Crank,SIR Light / Service Airbag Message, Service Suspension Message,Radio display blank, Steering Wheel Con…

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.