Home › Jaguar › 2012 › XK 2D Convertible › Repair and Diagnosis › Engine Performance › Engine Control Systems › Diagnostic Trouble Code Index DTC: Speed Control Module (CCM) -- XK/X150 › Diagnostic Trouble Code Index DTC: Speed Control Module (CCM) › Description And Operation › Speed Control Module [CCM] › DTC B1A84-81: Car Configuration Data - Invalid serial data received › Possible Causes