OBD-II FAULT CODE
B2201

No Communication With Traffic MasterModule

Meaning, symptoms, likely causes, diagnostic checks and repair guidance for B2201.

BodySystem
Network / communicationCategory
HighSeverity
  • Body/accessory warning lamp or feature not working
  • Low battery voltage
  • Blown module fuse
  • Poor ground
  • Open/short on communication bus
  • Module offline
  • Check related fuses, connectors, grounds and switch/module power supply
  • Run a full system scan to identify modules not responding
  • Inspect CAN/SCP wiring, connectors and grounds
  • Repair power/ground or network wiring fault first
  • Only consider module replacement after wiring and power supply checks pass
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Disclaimer: Information is provided for general guidance only and may not apply to all vehicles. Always consult a qualified technician.