You are in limp mode, and there are a multitude of factors to this... anything from a misfire to hitting a pot hole just the right way to trigger a sensor.. if you dont wanna go to the stealership i can scan your car. Also, another way to get it out of limp mode is to disconnect the battery, then (with both terminals disconnected) connect the positive and the negative wires to drain all power. then re-connect and go for a spin. im not sure if the dealership is gonna charge you to scan it, but if not go for it, and make sure they give you the exact code and look it up yourself so they dont pull any shit. but if they want to charge you to scan it and you dont wanna pay just hit me up. GL!