duckdo

As my other thread car running lumpy plugged a obd11 reader and three faults came up
P0102 mass air flow a circuit low
P0113 intake air temp sensor 1circuit high
P0519 idle air control system performance

I cleared the codes and the only reoccurring
Code that comes up is the p0519

So now i a bit stuck looked on the net it said it could be idle sensor
Wireing to sensor or a vacum leak

Not sure where to look for such sensor
Any help would be greatfull

Thanks dean