2012 stall and 4x4 problem

[2012 ram 1500]

2012 ram 1500 5.7 L.

RPMs fall off and stalls when truck is at a stop happens intermittently.
4 x 4 works intermittently and then throws service four wheel light.
Need help had two different scanners hooked to it and both showed no issues.

 

[Jeepwalker]

Maybe consider reposting your new scanner findings to the same message you posted yesterday??