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 C1009-31: Right Power Side Step Position/Motion Sensor - No signal >> Possible Causes