Home >> Land Rover >> 2022 >> Defender 90 >> Repair and Diagnosis >> General Information >> Specifications Index >> Diagnostic Trouble Code Index DTC: Instrument Panel Cluster (IPC) Control Module -- Defender/L663 >> Diagnostic Trouble Code Index - DTC: Instrument Panel Cluster (IPC) Control Module (G2400899) >> Description And Operation >> Instrument Panel Cluster (IPC) Control Module >> DTC B100D-64: Column Lock Authorization - Signal plausibility failure >> Possible Causes