Related To Sonar

WARNING: This page is about a different car, the 2016 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.

Symptom	Possible cause
Unstable object detection	The vehicle is on a rough surface, such as stone or gravel. When used in poor weather conditions, such as heavy snow/rain strong wind. When subjected to an ultrasonic noise generated from exhaust muffler or brakes. When left standing in the hot sun or in a cold climate. When the surface of the sensor is frozen or covered with snow/dirt/moisture. When a retrofitted xenon lamp, lighted license plate, or harness is close to the sensor body or sensor harness. When subjected to loop coil noises generated from a vehicle detector placed at an intersection or coin parking area. When front license plate (if equipped) is bent and obstructing the sensor detection area.
Object undetectable	Air-containing objects, such as cloth, cotton, glass wool, dust, and snow. Thin objects, such as rope, chain and wire. Smooth-faced objects placed in a slanting direction. Fast-moving small animals. A corner of an angular object. NOTE: If the sensor detection part is scratched, obstacles cannot be detected.

Symptom

Possible cause

Unstable object detection

The vehicle is on a rough surface, such as stone or gravel.
When used in poor weather conditions, such as heavy snow/rain strong wind.
When subjected to an ultrasonic noise generated from exhaust muffler or brakes.
When left standing in the hot sun or in a cold climate.
When the surface of the sensor is frozen or covered with snow/dirt/moisture.
When a retrofitted xenon lamp, lighted license plate, or harness is close to the sensor body or sensor harness.
When subjected to loop coil noises generated from a vehicle detector placed at an intersection or coin parking area.
When front license plate (if equipped) is bent and obstructing the sensor detection area.

Object undetectable

Air-containing objects, such as cloth, cotton, glass wool, dust, and snow.
Thin objects, such as rope, chain and wire.
Smooth-faced objects placed in a slanting direction.
Fast-moving small animals.
A corner of an angular object.

NOTE:

If the sensor detection part is scratched, obstacles cannot be detected.