So I am going to have my truck emission tested tomorrow and so for kicks I hooked up my scan tool to see if it would say anything and if the emissions light would be green but it was yellow and got two codes, p0505 Idle Air Ctrl Motor Circs and p0123 Throttle Pos Sens Voltage Hi. I just put a v-8 throttle body and was having problems with it idleing high so I replaced the IAC sensor and it still did so I adjusted the stop screw for the throttle to make it idle where it should be. Neither of these codes set off the check engine light but just wondering if these will affect it and also what would be the best way to fix these. Any help would be great