Home >> BMW >> 2013 >> Alpina B7 >> Repair and Diagnosis >> Engine Performance >> System >> Self Diagnosis - Diagnostic Trouble Codes - DTC P14C0 - DTC U1179 (N63 & S63) >> Diagnostic Trouble Codes (DTCS) MSD85 - Bn2020 >> DTC U0137, BMW Hex Code 0xCDA904, BMW Code 13478148: Lost Communication With Trailer Brake Control Module >> Possible Fault Causes