If there are no codes then this is most likely a throttle body issue. You have what is called an electronic throttle body meaning there is no cable connecting the pedal and throttle plate. You have a pedal sensor that tells the PCM what the position of the pedal is and then the throttle is opened the same amount.
So more then likely if you had a pedal sensor issue or a throttle sensor issue it would set a code. So if there are no codes then the actuator in the throttle body is the faulty part.
I attached the process to replace this for your review. Thanks
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Friday, November 27th, 2020 AT 1:35 PM