It is listed as 'weak/bad, needs repair" I know that is a huge open ended statement, but I don't have more than that, no codes. it is a 2007, I am guessing with EGR.
Get an engine S/N I can look up how it was built and whether or not it had any form of exhaust aftertreatment.
2007 likely won't have any emissions garbage. Parts are readily available from perkins (1104) or Cat (3054). I have the perkins variety and almost all issues derive from the fuel system or electrical issues within the machine itself.