ford f250 6.7 diesel. engine wont start. check engine light code u059e. what is my problem

Question

engine wont start.  check engine light code u059e

Answer 1

U059E Invalid data received from Nox Sensor A

Do a KOEO (Key on engine off ) test and see if there is a exhaust temperature sensor code that is set, If the Exhaust temperature is indicating a hot temperature the engine management would cause the engine to shut off.