I have an o4 passat 1.8T. Driving around yesterday and car was running fine all morning. All of a sudden it starts to like bog out and slows down some. The car still ran enough to get me home but the check engine started flashing at me. So I changed the spark plugs and put some injector cleaner in, drove around some and still same problem? Any ideas what this could be? Any suggestion would be helpful! Thanks