Home › Land Rover › 2021 › Defender 110 › Repair and Diagnosis › General Information › Specifications Index › Diagnostic Trouble Code Index DTC: Tow Bar Control Module (TBM) -- Defender/L663 › Diagnostic Trouble Code Index - DTC: Tow Bar Control Module (TBM) (G2400887) › Description And Operation › Tow Bar Control Module (TBM) › DTC U3000-45: Control Module - Program memory failure › Possible Causes