2005 a4 2.0
 

Yesterday I drained my coiling system and did a ten minutes radiator flush on my vehicle however the very next day my cars check engine light came on with the codes Po 507 the guy at auto zone says that I need a new throttle body unit I'm tryna to save as much money as possible I was told it could be numerous of things like a vacuum leak and a variety of sensor does anyone have a clue what could be causing my problem