hey ive got a 2016 2.0 turbo engine. Ive got about 82000 miles. I was merging onto the highway and got to about 4000 rpm and got REDUCED ENGINE POWER and a FLASHING ENGINE LIGHT. I turned it off and back on drove on the shoulder and looped back to my home about 2 miles away. My scanners getting P0300. The idle is terrible and rpms are fluctuating between 400 and 1300 and sounds like the muffler is broken. With the hood up it sounds like coins inside a soup can. I had the plugs changed at 62000 and air filter was replaced for the second time at 60000. I always use premium 93 fuel as the car is a dog without it. Where do I start with this??!?!??!