The catlictic convertor inefficiency that I had in my first inquiry on this car a while back is OK now because I replaced the convertor and have drove it thousand of miles with no more codes showing up and getting better mileage, I think.. Fuel pump is OK also. It seems OK now. The reason for this inquiry is that sometimes the Security light will stay on when I first start it and just have to shut it off and restart it and it will stay off. This was like this when I first got the car. It will keep running even if I don't shut it off. It seems to have no effect on the running or start issure. 2 other times when I was going down the road, the car would stop running. It would restart both times with no future problems. Both times I failed to see if the security light was on when it stopped. The car stopping while going down the road only happened 2 times since I have had the car, less than a year. And it happened when I was coming to a stop. Is this a indication of a car that may not start in the future because of the security issue, or something else? Thanks for any input.