$712 $718 later, my car is fixed. About $200 of that was routine maintenance; I asked that it be done at the same time because (a) it’s about due and (b) it saves me a future trip. My “Service Engine Soon” light came on for 3 reasons. It detected problems with the spark plug and…

When I started my car at the metro station this evening, the Service Engine Soon light came on. This is the second time I can recall seeing this light in the 12 years that I’ve had the car. There is no noticeable problem–no strange noise or behavior. It’s even possible that there is a malfunction…