Todd is correct as its easy to forget about the pedal unit. It has sensors that tell the PCM what pedal posistion the driver wants and then the PCM will work the throttle body motor to move the throttle where it needs to go. The throttle body is not cheap and your best bet would be to have a shop diagnose it to be sure what it is. Not trying to be smart but you really need to know what your looking at to diagnose it right and not replace the wrong part. When I get one with alot of codes I pick one that makes the most sense and then diagnose that code which will usually get to fixing everything. I just dont want to see you replace the throttle body if your not sure thats it. Its tuff to try and diagnose over the internet. With the scan tool you can read the APP sensors and the TPS sensors to see just what is going on and you can acuate the throttle body motor to see if the PCM can comand it. Ron