180 is exactly right. The dealer, however, may not be. There is no "Not Ready" message. Their reader is likely showing a number of codes that will only reset by running the car for a while. This is very common. The check engine light will not be on unless there is an actual problem. The dealer cannot sell the car and transfer the ownership until the meters re-set and you get good readings. I believe that they are allowed one code to remain, and it's usually the evap. No worries.