B2201: No Communication With Traffic MasterModule

What does B2201 mean?

B2201 is a diagnostic trouble code indicating "No Communication With Traffic MasterModule". The vehicle's main computer has lost its ability to communicate with a specific module over the data bus. This could be caused by a wiring fault, a blown fuse, or a failed control module.

Symptoms you may notice

• Check engine light (MIL) illuminated on dashboard
• Possible issues with body electronics operation
• Vehicle may enter reduced power mode (limp mode)

Common causes

• Failed control module
• CAN bus wiring fault or short
• Blown fuse to the affected module
• Water intrusion in a connector or module
• Battery voltage too low

What should you do?

Schedule a diagnostic appointment at your earliest convenience. The vehicle is generally safe to drive short distances, but the underlying issue should be addressed to prevent it from worsening.