Home >> Jaguar >> 2012 >> XK 2D Convertible >> Repair and Diagnosis (Single Page) >> Quick Lookups >> DTC Index >> Diagnostic Trouble Code Index DTC: Auxiliary Junction Box (AJB) -- XK/X150 >> Diagnostic Trouble Code Index DTC: Auxiliary Junction Box (AJB) >> Description And Operation >> Rear Junction Box [RJB] >> DTC B11DB-49: Battery Monitoring Module "A" - Internal electronic failure >> Possible Causes