Home >> Jaguar >> 2017 >> XJR L >> Repair and Diagnosis >> Restraints >> Restraints Control Systems >> Diagnostic Trouble Code Index DTC: Restraints Control Module (RCM) -- XJ/X351 >> Diagnostic Trouble Code (DTC) Index DTC: Restraints Control Module (RCM) >> Description And Operation >> Restraints Control Module (RCM) >> DTC U201A-51: Control Module Main Calibration Data - Not programmed >> Possible Causes