Home › Land Rover › 2021 › Defender 110 › Repair and Diagnosis (Single Page) › General Information › Specifications Index › Diagnostic Trouble Code Index DTC: Body Control Module (BCM) -- Defender/L663 › Diagnostic Trouble Code Index - DTC: Body Control Module (BCM) (G2400885) › Description And Operation › Body Control Module (BCM) › DTC U201A-51: Control Module Main Calibration Data - Not programed › Possible Causes