Home › Land Rover › 2015 › LR2 Base › Repair and Diagnosis › Transmission › Transmission Control Systems › Diagnostic Trouble Code Index DTC: Transmission Control Module (TCM) -- LR2/L359 › Diagnostic Trouble Code Index DTC: Transmission Control Module (TCM) › Description And Operation › DTC P0860-13: Gear Shift Module A Communication Circuit - Circuit Open › Possible Causes