Home >> Land Rover >> 2021 >> Discovery S >> Repair and Diagnosis >> 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 P0A1A-87: Generator Control Module - Missing message >> Possible Causes