Home >> Jaguar >> 2014 >> XK Base, 2D Convertible >> Repair and Diagnosis >> General Information >> DTC Index >> Diagnostic Trouble Code Index DTC: Headlamp Control Module A (HCM) -- XK/X150 >> Diagnostic Trouble Code Index DTC: Headlamp Control Module A (HCM) >> Description And Operation >> Headlamp Control Module [HCM] >> DTC B1087-86: LIN Bus "A" - Signal invalid >> Possible Causes