Home >> Jaguar >> 2021 >> XF S >> 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 - DTC: HVAC Control Module (HVAC) (G1951983) >> DTC U3000-87: Control Module - Missing message >> Possible Causes