Spadge gongloid

Hello all, my 2008 1.9cdti twinny is giving me hell its basically running poor at 1500 revs the whole car judders and vibrates, i have these codes 2279 1125 2345a Yesterday the 2345a code came up and saw that a vacuum hose was loose so i changed that and the light went away ( car spanner light). Today i was on the dual carriageway still lacking power and then the emissions light appeared which gave me the code 1125 from the pedal test. Does anyone have any ideas or what i should be looking at?. The fuel filter and air filter were changed last friday, egr was cleaned along with the map sensor which werent that dirty to be fair. Inlet manifold had had the swirl flaps removed too.