Home >> Land Rover >> 2021 >> Defender 110 X-Dynamic SE >> Repair and Diagnosis >> Quick Lookups >> Common Specs & Procedures >> Diagnostic Trouble Code Index DTC: Gateway Module (GWM) -- Defender/L663 >> Diagnostic Trouble Code Index: Gateway Module (GWM) (G2801686) >> Description And Operation >> Gateway Module (GWM) >> DTC B1412-87: Quiescent Relay Box - Missing message >> Possible Causes