Komatsu PC200-8N1 Error code D19JKZ

help! how to disable lock engine function? komatsu pc200-8N1 5x engine oil flushing pulled out injectors for flushing of the combustion chamber reinstalled injectors replaced monitor and engine controller cleaned and checked all electrical socket and connectors it shows error code D19JKZ and we've already checked all harness and fuses. they're all okay. the engine won't start but it's cranking, just wont continue