Home >> Land Rover >> 2021 >> Defender 110 X >> Repair and Diagnosis (Single Page) >> Quick Lookups >> Common Specs & Procedures >> Diagnostic Trouble Code Index DTC: Vehicle Immobilizer Control Module (Vim) -- Defender/L663 >> Diagnostic Trouble Code Index - DTC: Vehicle Immobilizer Control Module (Vim) (G2400891) >> Description And Operation >> Vehicle Immobilizer Control Module (Vim) >> DTC B100D-42: Column Lock Authorisation - General memory failure >> Possible Causes