Home › Land Rover › 2015 › LR2 Base › Repair and Diagnosis › Quick Lookups › DTC Index › Diagnostic Trouble Code Index DTC: Telephone Interface Module (TIM) -- LR2/L359 › Diagnostic Trouble Code Index DTC: Telephone Interface Module (TIM) › Description And Operation › DTC U201A-54: Control Module Main Calibration Data - Missing calibration › Possible Causes