So I read my codes without the engine being warmed up and later on did some more research and figured out it needed to be warmed up and that I needed to do a goose test while the engine was running before reading the codes. Should I take the codes that were given to me before the engine was to operating temp into account at all? I threw quite a few codes on and off while the motor was cold. Only threw 539 and 11 when it was warmed up. My heater was on so I'm not worried about the 539 code. 93 mtx. I'm only asking because my idle fluctuates between 900 and 1500 when driving in town and coming to a stop at a light. Also my steering feels a little funky and it threw codes for both when it was cold. Would like to know before I do anymore research or add anything to my cart for my 60k plus anything that needs to be replaced.