Home › Jaguar › 2017 › XJR Base › Repair and Diagnosis › Transmission › Transmission Control Systems › Diagnostic Trouble Code Index DTC: Transmission Control Module (TCM) -- XJ/X351 › Diagnostic Trouble Code (DTC) Index DTC: Transmission Control Module (TCM) › Description And Operation › Transmission Control Module (TCM) › DTC P061B-64: Internal Control Module Torque Calculation Performance - Signal plausibility failure › Possible Causes