2012 International durastar 4300 dt466

I have a orange triangle light coupled with an LCD msg "*Exhaust module". It comes and goes. No active stored spns. (9) prev. active stored.

 

Thank you, ill check it today. Is it normal? Is it related to the DPF filter or system?

 

Ok checked above visor and owners manual. I think it must be related to the AFI control ? The previously active code that seems to be related is spn 3479 fmi 4, and 1382 fmi 14. The manual says those msg's displayed are "other" than the engine requests the triangle. Should I replace the FMI module, or run it till the code is active, not previously active?