Home >> Land Rover >> 2016 >> LR4 Base >> Repair and Diagnosis >> General Information >> DTC Index >> Diagnostic Trouble Code INDEXDTC: Headlamp Leveling Control Module (HLCM) -- LR4/L319 >> Diagnostic Trouble Code Index DTC: Headlamp Leveling Control Module (HLCM) >> Description Of Operation >> DTC B1087-86: LIN Bus "A" - Signal invalid >> Possible Causes