Home >> Jaguar >> 2021 >> XF R-Dynamic SE >> Repair and Diagnosis (Single Page) >> Quick Lookups >> Common Specs & Procedures >> General Information - Diagnostic Trouble Code (DTC) Index (DSM/PSM - HVAC) -- XF/(X260) >> General Information >> Description And Operation >> Diagnostic Trouble Code Index - SPORTBRAKE, DTC: Gateway Module (GWM) (G2165050) >> DTC B1412-87: Quiescent Relay Box - Missing message >> Possible Causes