Sensor Status Check

WARNING: This page is about a different car, the 2004 Nissan Titan. However, it is still accessible from the selected car via links, so may be relevant.

Check that the rear sonar sensor is properly aligned (bumper is not misaligned, no deformation in sensor mounting area.
Check that snow, mud, or other foreign objects are not adhering to the rear sonar sensor.
Check that there is no deformation, scratches, or other damage to the rear sonar sensor.
Check that water has not accumulated in the rear sonar sensor.

CAUTION: Use water, cotton swab, or other soft material for cleaning the sensor.

Check that there are no obstacles within each rear sonar sensor's detection range.

Fig 1: Detection Range Specifications
Courtesy of NISSAN MOTOR CO., U.S.A.
Check that there are no nearby ultrasound sources (such as the sounds of vehicle horns, motorcycle engines, or truck air brakes).
Check that the vehicle is on level a surface.