AHHHH I wish I had found this thread a week ago!!
I came back from a 500 mile trip and parked the car for a few hours. Got back in to go to the store and the car would not idle for chit and CEL came on.
Next day took her to Autozone and to get the codes... P0113, P0171, P1131. After searching the net for help I decided to check out all the hoses. Sure nuff the PCV hose was collapsed at one end. Took the hose off and cut it back an inch or so. And whaddayaknow. Runs and idles great!!! Gonna hit the dealer and get a new hose.