U0002: 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 U0002 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

11 complaints filed with NHTSA mention U0002, 10 of them since 2015, across 9 different models. The component owners most often filed it under: electrical system.

Most-reported models

VehicleComplaintsModel years reported
DODGE CHARGER32009, 2012, 2013

Manufacturer service bulletins that name U0002

16 technical service bulletins and manufacturer communications filed with NHTSA mention U0002, from 1 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:

  • RAM 1500 (2023, 2024), bulletin 10242715: EPS Steering Gear Prior to replacing EPS gear for Can C Bus Diagnostic Trouble Codes (DTCs), U0001 & U0002, please contact FCA Redacted Content. Please have the following info available: VIN, vehicle complaint, diagnosti…
  • RAM 2500 (2013), bulletin 10136532: Flash: Powertrain Diagnostic And System Improvements This bulletin involves reprogramming the Powertrain Control Module (PCM) with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL…
  • RAM 3500 (2013), bulletin 10139840: Flash: 6.7L Diagnostic and System Improvements This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software. Several software improvements are available for vehicles …

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.