Home >> Jaguar >> 2014 >> XF Base >> Repair and Diagnosis >> Transmission >> Transmission Control Systems >> Diagnostic Trouble Code Index DTC: Transmission Control Switch (TCS) -- XF/X250 >> Diagnostic Trouble Code (DTC) Index DTC: Transmission Control Switch (TCS) >> Description And Operation >> DTC U101A-86: Lost Communication With TCM - Multiple Bus - Signal invalid >> Possible Causes