Elevation System Check

WARNING: This page is about a different car, the 2018 Lincoln Navigator. However, it is still accessible from the selected car via links, so may be relevant.

Check

Turn the ignition ON, engine OFF.

Courtesy of FORD MOTOR COMPANY
Set the parking brake.
Place the gearshift in REVERSE (R) for rear parking aid sensors.
Place the gearshift in DRIVE (D) for front parking aid sensors.
Using a diagnostic scan tool, monitor the PAM parking aid sensor distance Parameter Identifications (PIDs) to verify the PAM detects no objects.
If the audible warning is heard or if the Parameter Identifications (PIDs) indicate an object is detected, check to make sure the bumper is correctly installed and is not tilted downward so the sensor is pointing at the ground. Refer to DIAGNOSIS AND TESTING .