The other day, my CEL and VSC off & trac lights came on so I went to Autozone to get a readout of what the problem is since they offer free obdII scans. I figured I'd do this before I take it to Toyota so I know for myself. Well it turns out that there is multiple cyclinder misfire, especially in cylinder 7. Now my question is, what can cause a cylinder misfire? What can fix it (replacing spark plug wires, coils, etc)? Ironically, there were no readouts on why the VSC lights came on. Anyways the car is being dropped off Friday for an oil change and I'll have them look at the CEL and VSC problem and see what they "claim". FYI the engine has 75,200 miles on it and the last major tuneup I had was in June 2005.