Home >> Land Rover >> 2021 >> Defender 90 X >> Repair and Diagnosis (Single Page) >> Quick Lookups >> Common Specs & Procedures >> 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 B1538-93: Electrically Deployable Tow Bar Movement Motor - No operation >> Possible Causes