Codes p2111 and p2104?

i was data logging my truck and the failsafe mode came on and went to idle mode. i got home and looked these codes up. i changed the throttle body with a bigger 80mm bbk throttle body. drove it down the road and the same codes came back up. so, i bought a 75mm throttle body. it done good for a day then going down the road almost at a stop it did it again. 3 throttle bodies and the same code. now i got that 75mm throttle body on. it's not done it in 3 days now. but the idling is surging up and down. what sensor is fixing to go out. I'm thinking accelerator pedal position sensor.