One problem related to check engine light on has been reported for the 1999 Kia Motor Sephia. The most recently reported issues are listed below.
The brakes squeak and the pads were replaced at 1200 miles, the brakes failed again at 6600 miles the rotors were warped and the pads were worn and I returned the car to northwestern Dodge and kia and they replaced the pads and machined the rotors, however the stering wheel shakes and vibrates when I drive on the expressway and the brakes are still grinding. The stering wheel and column vibrates and shakes when I drive at 50+ mph. At 6600 miles the check engine light illuminated and there is a burning smell. The car dies out when I am at a stand still for no reason and without any warning. I have to start the car at least 3 times before it turns over. Overall I would say that I am disappointed with the car and the moment that I can trade it in I plan to do so and I will advise anyone who is thinking about purchasing this car to not even consider a kia (any model) because they are not well made cars.