Yah thats what I mean, I get no codes. I even plugged it in to see the history, nothing, and nothing is pending. It did it again today too, stomped on it in about 4th gear full boost, then nothing until I got it home. Shut it off for a minute started back up and full boost. I am clueless. (I don't know what my vacuum is at idle, got nothing to measure it with or tools until I get home, currently doing some training in a different province) And yes the light works, and I had to clear a code recently because my gas cap wasn't sealing properly which set off a code.