Home >> Land Rover >> 2021 >> Discovery S >> Repair and Diagnosis (Single Page) >> Quick Lookups >> DTC Index >> Diagnostic Trouble Code Index DTC: Gateway Module (GWM) -- Discovery/L462 >> General Information >> Description And Operation >> Diagnostic Trouble Code Index: Gateway Module (GWM) (G2165407) >> DTC B1412-87: Quiescent Relay Box - Missing message >> Possible Causes