Cleaning the inside of the throttle body may not help anything , this was an issue for carbon on cars with a iac getting stuck.
You need to take the plastic cover off the side of the throttle body. If its a non turbo car is very easy . And clean around the magnetic pickup for the throttle position sensor. And put it back together.
On turbo car you need to take off the throttle body. The gasket is actually a o ring and they usually dont break.
The error code is for missmatch between the 3 different sensors in the throttle plate . Basically if all 3 arnt saying the same thing it sets code and outs car into limp mode.