Home › Land Rover › 2015 › LR2 HSE › 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 U0300-4A: Internal Control Module Software Incompatibility - Incorrect Component Installed › Possible Causes