Las week my 08' Expy, 155k miles started acting up. I almost blocked my long, narrow, steep drive with it, but managed to get it down to the road. It starts but has no throttle response. Idles a little rough too. It is unable to move under it's own power. I picked up a code reader today, here is what I cam up with;

P0122 throttle pedal position sensor/switch A circuit low
P0223 throttle pedal position sensor/switch B circuit high
P2101 throttle actuator control motor circuit range/performance
P2110 throttle actuator control system forced limited rpm

I am looking for any help or advice on where to start trouble shooting.