Difference between predicted and actual distances

The distance guide line and the vehicle width guide line should be used as a reference only when the vehicle is on a level, paved surface. The distance viewed on the monitor is for reference only and may be different than the actual distance between the vehicle and displayed objects.

See also:

Clearing the programmed information
Individual buttons cannot be cleared. However, to clear all programming, press and hold the two outside buttons and release when the indicator light begins to flash (approximately 20 seconds). ...

Tire Pressure Monitoring System (TPMS) (if so equipped)
Each tire, including the spare (if provided), should be checked monthly when cold and inflated to the inflation pressure recommended by the vehicle manufacturer on the vehicle placard or tire ...

Brakes
If the brakes do not operate properly, have the brakes checked by a NISSAN dealer. Self-adjusting brakes Your vehicle is equipped with self-adjusting brakes. The front and rear disc-type brakes ...