Home › Land Rover › 2021 › Defender 110 S › Repair and Diagnosis › General Information › Specifications Index › Diagnostic Trouble Code Index DTC: Power Steering Control Module (PSCM) -- Defender/L663 › Diagnostic Trouble Code Index - DTC: Power Steering Control Module (PSCM) (G2400908) › Description And Operation › Power Steering Control Module (PSCM) › DTC U1A4C-53: Build/End of Line mode Active - Deactivated › Possible Causes