Poor handling can be a sign of low tire pressure. To check the tire pressure on a 2013 Nissan Sentra, remove the valve cap from the tire and use a pressure gauge to read the current pressure.
If your tires do require inflation, check the appropriate inflation level you need first—by reading the tire pressure and loading information label inside the driver’s side door jamb. You can then begin pumping your tires. The front lights will flash when the tire has reached the appropriate cold pressure.