Home › Jaguar › 2015 › XK 2D Convertible › Repair and Diagnosis › General Information › DTC Index › Diagnostic Trouble Code Index DTC: Rear Differential Control Module (RDCM) -- XK/X150 › Diagnostic Trouble Code Index DTC: Rear Differential Control Module (RDCM) › Description And Operation › Rear Differential Control Module › DTC U0001-88: High Speed CAN Communication Bus - Bus off › Possible Causes