Home >> Jaguar >> 2017 >> F-Pace First Edition >> Repair and Diagnosis >> Quick Lookups >> DTC Index >> Diagnostic Trouble Code Index DTC: Automatic Temperature Control Module (ATCM) - F-Pace >> Diagnostic Trouble Code Index DTC: Automatic Temperature Control Module (ATCM) >> Description And Operation >> Automatic Temperature Control Module (ATCM) >> DTC B12B9-87: Auxiliary Heater Control Module - Missing message >> Possible Causes