Home >> Land Rover >> 2021 >> Defender 110 >> Repair and Diagnosis >> General Information >> Specifications Index >> 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 U0001-88: High Speed CAN Communication Bus - Bus off >> Possible Causes