Home › Land Rover › 2013 › Range Rover Sport GT Limited Edition › Repair and Diagnosis › Transmission › Transmission Control Systems › Diagnostic Trouble Code Index DTC: Module Name: Transfer Case Control Module -- Range Rover Sport/L320 › Diagnostic Trouble Code Index DTC: Module Name: Transfer Case Control Module › Description And Operation › DTC U0001-88: High Speed CAN Communication Bus - Bus off › Possible Causes