FORD 2013 Explorer v.2 - Manual (Page 241)

The system does not position the vehicle where I want in the
space
The vehicle is rolling in the opposite direction of the transmission (i.e.
rolling forward when R [Reverse] is selected)
The transmission is in R (Reverse); the vehicle must be moving
forward to detect a parking space
An irregular curb along the parking space prevents the system from
aligning the vehicle properly
Vehicles or objects bordering the space may not be positioned correctly
The vehicle was pulled too far past the parking space. The system
performs best when you drive the same distance past the parking
space
The tires may not be installed or maintained correctly (i.e. not inflated
correctly, improper size, or of different sizes)
A repair or alteration has changed detection capabilities
A parked vehicle has a high attachment (i.e. salt sprayer, snowplow,
moving truck bed, etc.)
The parking space length or position of parked objects changed after
your vehicle passed
The temperature around your vehicle changes quickly (i.e. driving from
a heated garage into the cold, or after leaving a car wash)
REAR VIEW CAMERA SYSTEM (IF EQUIPPED)
WARNING: The rear view camera system is a reverse aid
supplement device that still requires the driver to use it in
conjunction with the interior and exterior mirrors for maximum
coverage.
WARNING: Objects that are close to either corner of the
bumper or under the bumper, might not be seen on the screen
due to the limited coverage of the camera system.
WARNING: Back up as slow as possible since higher speeds
might limit your reaction time to stop the vehicle.
Parking Aids 241
2013 Explorer (exp)
Owners Guide gf, 2nd Printing
USA (fus)