I have a 2000 Sportage with 99000 miles and I put every one one the car. It has been a great car with few problems. The Oil light came on and I stopped and checked the oil. It was OK. Restarted and ran for a mile or so and the light came on again. This time I stopped and had it towed home. Could this be something stopped up or a switch failure? I had the oil changed about a week previous to this problem. Oil change was not a Kia dealer but I used a Kia filter, as I have many times. How can I check to see if the pump is working? Is changing the oil pump something a home mechanic can do? Any help will be appreciated.