08R320CDI

I recently had a code reader hooked to my car, and it was telling me that at idle, my throttle voltage was reading 19.6, with a little blip of the pedal it would jump to 96 something. So my question is, how can I go about checking my pedal to make sure that it isn't on its way out, and what is the voltage output supposed to be at from 0-100% throttle?