Home › Land Rover › 2015 › LR4 Base, 4WD › Repair and Diagnosis (Single Page) › Quick Lookups › DTC Index › Diagnostic Trouble Code Index DTC: Gateway Module (GWM) -- LR4/L319 › Diagnostic Trouble Code Index DTC: Gateway Module (GWM) › Description Of Operation › DTC B11DB-87: Battery Monitoring Module "A" - Missing message › Possible Causes