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OBD-II Generic Network DTCs
(Diagnostic Trouble Codes U0000-U0499)


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  • U0001: High-speed CAN communication bus fault
  • U0002: High-speed CAN communication bus performance
  • U0003: High-speed CAN communication bus off
  • U0100: Lost communication with ECM/PCM
  • U0101: Lost communication with TCM
  • U0102: Lost communication with transfer case control module
  • U0103: Lost communication with gear shift control module
  • U0114: Lost communication with four-wheel drive clutch control module
  • U0121: Lost communication with ABS control module
  • U0131: Lost communication with power steering control module
  • U0140: Lost communication with body control module
  • U0151: Lost communication with restraints control module
  • U0164: Lost communication with HVAC control module
  • U0184: Lost communication with radio
  • U0198: Lost communication with telematics module

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