Home >> Land Rover >> 2021 >> Discovery R-Dynamic HSE >> Repair and Diagnosis >> Quick Lookups >> DTC Index >> Diagnostic Trouble Code Index DTC: Restraints Control Module (RCM) -- Discovery/L462 >> General Information >> Description And Operation >> Diagnostic Trouble Code Index - DTC: Restraints Control Module (RCM) (G2272456) >> DTC B0021-56: Left Curtain Deployment Control 1 - Invalid/incomplete configuration >> Possible Causes