Codes 1flash pause 2flash pause 5flash pause 5flash complete! Meaning please?

What is your question?

I have a 19994 dodge ram B350 and every time I put the car in gear ir cuts off! I've changed the transmission filter and trans oil &I also changed the oil and filter and spark plugs and wire! The codes that come back are as follows! 1flash then pause 2flash then pause 5flash then pause 5flash system check complete! Can someone please assist? Oh yeah it's s 5.9 engine! Thank you in advance...

What makes this problem better or worse?

Every time I put the vehicle in gear it just shut right off

How long has your 1994 Dodge B350 had this problem?

About 3 weeks