I've got a 2014 Avenger with the 4 cylinder. In the last week or two, when I get on it some, like leaving the ramp to get on the freeway, it will stumble after it shifts ( almost like you turn the key off and back on very quickly). Then it runs OK after that. But today, after it did that one time, the ETC light came on. We stopped to get groceries, and when we got back on the road again, the light was off again. Thanks for any help.