My CEL won't be diagnosed until tomorrow. I've been driving it two weeks with the light on, and I really cannot notice any drivability problems. It's just that the car was fine for a year and 15K miles, ever since the 15K service, I've had it in every two weeks for some damn thing. I drove SAABs for twenty years before the Volvo, and never had one drivability issue, in fact the only major component I ever replaced was a water pump on an '85 turbo with 164K miles. I thought the Volvo would be about the same. Will post tomorrow after service appointment, but I can promise you it is not a loose gas cap.