2013 Hyundai Sonata Owner's Manual - Page 149

Features of your vehicle OYF049063N OYF049064N OYF049065N Key is not detected If the smart key is not in the vehicle or is not detected and you push the engine start/stop button, the warning illuminates on the LCD screen for 10 seconds. Low key battery When the smart key in the vehicle discharges, the warning illuminates on the LCD screen for 10 seconds. Replace the battery with a new one. If it is not possible, you can start the engine by inserting the smart key into the smart key holder and pushing the engine start/stop button. Press brake pedal to start engine If the engine start/stop button turns to the ACC position twice by pushing the engine start/stop button repeatedly without pressing the brake pedal, the warning illuminates on the LCD screen for 10 seconds to indicate that you should press the brake pedal to start the engine. 4 68