I was just going to start a thread about the problem I had, when I saw the post about the zero point calibration. This is exactly what happened to me, I went in for an emission test, they hooked up the reader, and when I left, the VSC trac and VSC off lights were lit and the check engine light. The article says the check engine light shouldn't come on. Will this same fix work? Has anybody else had this and is there a different solution. It sounds a little confusing, but will print it out and give it a shot.