P0022 -2005 Ford Expedition what do I replace to cure this code?

Question

My 2005 Ford Expedition has 78,000 miles on it, the air cleaner is new, the sparkplugs are new, the throtle body is clean, there are no visable issues so I am assuming it is a sensor that is causing P0011 and P0022 to indicate. The engine runs fine when the accelerator pedel is pushed it just idles horably. Are there sensors on the throttle body that need replacing or can you only replace the entire throttle body?