I have a '13 with 80k miles. Recently will have a load ticking /knocking noise and it will have a lot of hesitation, bogging down, and under powered. It doesn't happen all the time, sometimes it runs just fine and others it doesn't , no rhyme or reason. After researching a bit I changed the cam shaft position sensors as well as the spark plugs and it didn't help. I figure since it is intermittent and not always happening it is likely a sensor of some kind but I am at a loss at this point. When it is happening it doesn't even kick and engine light on so there is no code to check. Any ideas??