Hello, I'm Danny.
That code is more directly related to the throttle actuator control system. Your pedal assembly acts as a potentiometer. If it's defective/malfunctioning it will trip the code P0228 and put the car into limp mode like you're experiencing. I've attached a picture below and circled in the red the sensor connection. Hope this helps and thanks for using 2CarPros.
Tuesday, December 3rd, 2019 AT 12:50 PM