Home >> Land Rover >> 2021 >> Defender 110 X >> Repair and Diagnosis (Single Page) >> Quick Lookups >> Common Specs & Procedures >> Diagnostic Trouble Code Index DTC: Gear Shift Module (GSM) -- Defender/L663 >> Diagnostic Trouble Code Index - DTC: Gear Shift Module (GSM) (G2560774) >> Description And Operation >> Gear Shift Module (GSM) >> DTC P085D-96: Gear Shift Control Module "A" Performance - Component internal failure >> Possible Causes