Vw idle issues.

[Fireflyguy65]

Hi all at pistonheads,firstly that to admin for letting me join....Now heres the thing,i own a mk4 golf 1.6 16 valve,just over a month ago,i had engine check symbol come up on my dash,so i checked codes on my obd device,and at first it was to do with lamda sensors,so replaced both,those codes went away,but then i got epc and the light with yellow circle and (!) In it,i cleaned throttle body,and changed the egr valve,resset cpu.and at first was ok,the problem normaly starts via the brake pedal,i had a garage take a look,and i was told brake switch isn't communicating with the cpu...i changed the switch,but problem still persists.....i have no vaccum leaks...so thinking my throttle body is at fault,or the map sensor...as i now have fault code P0106....so now i haven't a clue as to were to look,can someone shed any light on what could cause my idling issue...
Sorry for long message...👍