Home >> Land Rover >> 2021 >> Range Rover SVAutobiography Dynamic Blk. >> Repair and Diagnosis >> General Information >> Specifications Index >> Diagnostic Trouble Code Index DTC: Seat Module - Driver/Passenger Low Line Seating Specification (DSM/PSM) -- Range Rover/L405 >> General Information >> Description And Operation >> Diagnostic Trouble Code Index - DTC: Seat Module - Driver/Passenger Low-Line Seating Specification (DSM/PSM) (G2409228) >> DTC B1543-87: Front Seat Switch Pack - Missing message >> Possible Causes