How to fix U0121 Code: Lost Communication with Anti-Lock Braking System (ABS) ModuleA U0121 means that the vehicle CAN Bus can’t communicate with the Anti-Lock Braking System (ABS) Module.The CAN (Controller Area Network) is a protocol that allows the ECM, PCM, TCM, and ABS modules to communicate with each other.Symptoms of a U0121 Code: Warning lights (ABS ESP BAS Lights)ABS performance issuesPossible Causes of a U0121 Code: Blown FuseIssues with Alternator Charging or Battery Faulty ABS contro

6K views · 100 reactions | 2014 VW Passat with an adaptive cruise control issue Fault code 00272 (Function disabled due to electromagnetic interference). TaT members can read the full repair solution at www.tat.net.au/tatsafact/3329 To join TaT and get instant access to our Repair solution database visit www.tat.net.au/social.html Burson Auto Parts | The Automotive Technician | Facebook