Home >> Land Rover >> 2021 >> Defender 90 First Edition >> 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