What does it mean when my change oil light is on after and oil change?

Ok, so one day i turn on my car and the low tire pressure light and change oil light came on. I put air in the tires and they dont look low and i changed the oil, they are still on, what could this mean?|||The computer has to be reset to acknowledge these changes. It won't detect it on it's own. Any automotive repair shop can do this for you and will usually do it for free.|||To make the low air light go out, you have to put the correct amount of air in all of the tires and then drive the car at least 1 mile and the light will go out. If you changed the oil and the light is still on ask your dealer what the code is for making the light go out. every car is different. They should not charge you for this.|||on my car you hold in the trip reset button until it resets, but you are keeping what kind of car you have a secret|||computer needs reset. disconnect the battery terminals for 30 min a=then reconnect. The computer will reset itself.|||These are some of the good reasons why you should read the owner manual.|||the computer has to be reset so the light will go off.|||sounds like the garage didnt reset your oil change light.