Is your "Check Engine" or "Service Engine Soon" light on? If so, you may need to
"service your engine soon," but how can you know for sure what is wrong without taking
it to a mechanic and getting the diagnostic test. The car still runs fine, so what's the big deal.
The light will come on to warn the driver that there is an emission related failure on the
vehicle. Not all lights will cause a drivability problem at first. When your check engine or service engine soon light come on, be sure to go and have it checked out. Don't wait for
your car to stop running before you take it in for repairs, because the cost of waiting is
usually higher.