Home › Land Rover › 2021 › Defender 110 › Repair and Diagnosis › General Information › Specifications Index › Diagnostic Trouble Code Index DTC: Side Obstacle Detection Control Module - Left/Right (SODL/SODR) -- Defender/L663 › Diagnostic Trouble Code Index - DTC: Side Obstacle Detection Control Module - Left/Right (SODL/SODR) (G2400915) › Description And Operation › Side Obstacle Detection Control Module - Left/Right (SODL/SODR) › DTC U201A-57: Control Module Main Calibration Data - Invalid/incomplete software component › Possible Causes