Thank you for your reply. Serial# 5NR3337702. This truck continues to do the same. Every time after it sits for a period of time ( 30 min or longer) and you key up, the code comes up, but after you leave it on for a short period and re-key, it starts up and no code and is ok, as long as it isn't shut off again for a while. In this case, do you suggest to substitute logic, and if so what steps do I take to do this. Thank you.