Home › Jaguar › 2015 › XK 2D Coupe › Repair and Diagnosis › Transmission › Transmission Control Systems › Diagnostic Trouble Code Index DTC: Transmission Control Module (TCM) -- XK/X150 › Diagnostic Trouble Code Index DTC: Transmission Control Module (TCM) › Description And Operation › Transmission Control Module [TCM] › DTC U0103-83: Lost Communication With Gear Shift Control Module A - Value of signal › Possible Causes