Home › Land Rover › 2015 › LR2 Base › Repair and Diagnosis › Quick Lookups › DTC Index › Diagnostic Trouble Code Index DTC: Rear Differential Control Module (RDCM) -- LR2/L359 › Diagnostic Trouble Code Index DTC: Rear Differential Control Module (RDCM) › Description And Operation › DTC P0602-54: Powertrain Control Module Programming Error - Missing Calibration › Possible Causes