Home › Land Rover › 2017 › Range Rover Autobiography › Repair and Diagnosis › Quick Lookups › DTC Index › Diagnostic Trouble Code Index DTC: Gateway Module (GWM) -- Range Rover/L405 › Diagnostic Trouble Code Index DTC: Gateway Module (GWM) › Description And Operation › DTC U0300-46: Internal Control Module Software Incompatibility - Calibration/parameter memory failure › Possible Causes