Home >> Land Rover >> 2015 >> LR2 Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> Engine Control Systems >> Diagnostic Trouble Code Index GTDI 2.0L Petrol, DTC: Engine Control Module (ECM) -- LR2/L359 >> Diagnostic Trouble Code Index GTDi 2.0L Petrol, DTC: Engine Control Module (ECM) >> Description And Operation >> DTC P1623-44: Immobilizer Code Word/ID Number Write Failure - Data memory failure >> Possible Causes