Home >> Land Rover >> 2021 >> Defender 90 >> Repair and Diagnosis >> General Information >> Specifications Index >> Diagnostic Trouble Code Index: Restraints Control Module (RCM) -- Defender/L663 >> Diagnostic Trouble Code Index - DTC: Restraints Control Module (RCM) (G2768847) >> Description And Operation >> Restraints Control Module (RCM) >> DTC U0080-87: Vehicle Communication Bus F - Signal invalid >> Possible Causes