Home >> Land Rover >> 2021 >> Defender 110 X >> Repair and Diagnosis (Single Page) >> Quick Lookups >> Common Specs & Procedures >> 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 B1304-04: Electronic Power Assisted Steering System - System internal failures >> Possible Causes