Home › Land Rover › 2021 › Defender 90 › Repair and Diagnosis › General Information › Specifications Index › Diagnostic Trouble Code Index: Restraints Control Module (RCM) -- Defender/L663 › Diagnostic Trouble Code Index - DTC: Restraints Control Module (RCM) (G2768847) › Description And Operation › Restraints Control Module (RCM) › DTC U2016-51: Control Module Main Software - Not programed › Possible Causes