Home >> Jaguar >> 2014 >> XJR Base >> Repair and Diagnosis >> General Information >> DTC Index >> Diagnostic Trouble Code (DTC) Index DTC: Rear Differential Control Module (RDCM) -- XJ/X351 >> DIAGNOSTIC TROUBLE CODE (DTC) INDEX DTC: Rear Differential Control Module (RDCM) >> Description And Operation >> Rear Differential Control Module (RDCM) >> U0001-81 High Speed CAN Communication Bus - Invalid serial data received >> Possible Causes