Home >> Land Rover >> 2021 >> Defender 110 S >> Repair and Diagnosis >> 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 B153A-31: Electrically Deployable Tow Bar Movement Motor Sensor - No signal >> Possible Causes