Home › Land Rover › 2014 › LR4 Base, 4WD › Repair and Diagnosis › Quick Lookups › DTC Index › Diagnostic Trouble Code Index DTC: Rear Differential Control Module (RDCM) -- LR4/L319 › Diagnostic Trouble Code Index DTC: Rear Differential Control Module (RDCM) › Description And Operation › DTC P0607-49: Control Module Performance - Internal electronic failure › Possible Causes