Code Definition

B2201 — No Communication With Traffic MasterModule

System: Body  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About B2201

B2201 is a generic (obd-ii standard) body diagnostic trouble code. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

Scanning & clearing: Body (B) codes are often stored in the body control module, airbag module, or climate module. A basic OBD-II tool usually will not read body codes — an enhanced or OEM-level scan tool is typically required.

Because B2201 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

The B2201 code indicates that the head unit or gateway module cannot establish communication with the TrafficMaster Module on the vehicle's data bus. The TrafficMaster Module is a telematics unit, typically fitted to UK and European market vehicles, that receives live traffic information over RDS TMC or a dedicated cellular link and feeds the data into the navigation and infotainment system. The code is set when the head unit sends an address request to the TrafficMaster Module and does not receive a response within the expected time window. When this fault is active live traffic overlays will...

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