To reset the 2016 Kia Optima service required light after an oil change, please follow these instructions:
1. Start the engine. 2. If a service is due the display will show “Service required”. To reset this message, press the OK button on the right of the steering wheel for more than 1 second. 3. The service interval will be reset to the default setting. *The service interval feature has to be turned on and set by the user by accessing the SERVICE menu. Press the MODE button (rectangle icons) on the right of the steering wheel to highlight the SERVICE menu. Press the OK button to access the SERVICE INTERVAL menu and use the arrows to turn the SERVICE mode on and set the applicable interval. 4. Turn the ignition off and then start the engine to verify the indicator has been reset.