For the Voltage high codes I would say check the grounds real close but you may have set them yourself if you unpluged the sensors or left them unplugged with the key on. The codes you said it now hs are all related to the Electronic throttle body. Make sure the throttle body has a good ground. It is nice if you have the wiring schematic so you will know which is a ground. Usually high voltage readings are a bad ground of some type. Low voltge readins can be from a shorted sensor but it does not sound like thats your problem. You may end up replacing the throttle body. Ron