Home >> Jaguar >> 2018 >> XF S, AWD >> Repair and Diagnosis >> Quick Lookups >> DTC Index >> Diagnostic Trouble Code Index DTC: Adaptive Speed Control Module (ASCM) -- XF/X260 >> Diagnostic Trouble Code Index DTC: Adaptive Speed Control Module (ASCM) >> Description And Operation >> Adaptive Speed Control Module (ASCM) >> DTC B1A84-81: Car Configuration Data - Invalid serial data received >> Possible Causes