u/Competitive-Page-594

So here's the deal: I have a 2016 Chrysler 200 with 107,000 miles. Just bout it. It chugs a bit when accelerating into first gear, and only when the engine is cold. Otherwise, it's fine. I've replaced all the fluids and the motor mount. Took it to a mechanic and they ran diagnostics. Said everything was fine, but the chug into first gear is causing me concern. There's no check engine lights. Could it be the fuel injection system or transmission?