Home >> Jaguar >> 2012 >> XK 2D Convertible >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Headlights >> 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 B1087-88: LIN Bus "A" - Bus off >> Possible Causes