Home › Jaguar › 2012 › XKR-S 2D Convertible › Repair and Diagnosis › Transmission › Transmission Control Systems › Diagnostic Trouble Code Index DTC: Transmission Control Module (TCM) -- XK/X150 › Diagnostic Trouble Code Index DTC: Transmission Control Module (TCM) › Description And Operation › Transmission Control Module [TCM] › DTC P0500-81: Vehicle Speed Sensor A - Invalid serial data received › Possible Causes