Check Rear Park Aid – Explained


In the message center, you may see the message “check rear park aid” displayed if your Fusion is equipped with the Park Aid System (not all Fusions have this system). When you see this message, Park Aid is disabled. The message must be cleared by enabling the system.

PS: When Reverse and Park Aid are not active, this message will appear.

Rear Park Assist – what is it?

Rear Bumpers

Your rear bumper contains multiple ultrasonic sensor(s) used to operate your rear park assist. It only works when you are reversing. You have to check rear park aid properly by yourself.


The sensors can detect objects up to 8 feet right behind your vehicle, especially when backing up at low speeds.

A beep from the Rear Speakers

When Rear Park Assist detects an object while backing up, it emits a low-pitched beep from the rear speakers in your vehicle or, if it is fully equipped with Safety Alert Seat, the driver’s seat pulses two times (twice) on each side.

Low-Pitched Beeping

You will hear low-pitched beeping, if your vehicle is fully equipped with Safety Alert Seats, you will feel pulses on both sides of the steering wheel when an object is detected. You’ll hear or feel more beeps or pulses if your vehicle is closer to a detected object.

Distance-to-Object Information

As a detected object gets closer to your vehicle, distance-to-object information will appear on the infotainment system’s display.

Rear Speaker’s Beeping

Your vehicle’s rear speaker will beep five times, repeating very low-pitched beeps, when an object is in the range of approximately 2 feet of the bumper. If your vehicle has a Safety Alert Seats, the seats will pulse five times on both sides when an object is within 2 feet of the bumper.

Rear Vision Camera

On the Rear Vision Camera display, caution triangles, which change from yellow- amber- to red, will appear especially when your vehicle comes closer to the detected object right behind you. Better you should check rear park aid to make it all clear.

The path on the Parking Assist Display

Some vehicles will also be displaying a path on the Parking Assist display. Objects detected in the path of your vehicle will be the only objects alerted to you on these vehicles.

PS: In some vehicles, this check rear park aid process is controlled through vehicle settings or the Rear Park Assist’s system control. Kids, walking pedestrians, bicyclists, animal(s), or any objects below your vehicle’s bumper cannot be detected by Rear Park Assist. Ensure that ultrasonic parking assist sensors are also clean before backing up the vehicle. Your Vehicle’s Owner’s Manual will provide a diagram showing where these sensors are located and how to clean the same. You can find this information under the “Driver Assistance Systems” section in the Owner’s Manual.

How to Check Rear Park Aid?

  • Up or Down keys on the steering wheel must be pressed till “Settings” appear on the instrument panel, and then you can press the OK button.
  • Then, after “Driver Assist” appears, press OK again.
  • You can then press the up/down keys and OK button after the “Check Rear Park Aid” error displays.

How to Check Rear Park Aid System – How does it Work?

Fully Assisted Parking Aid’s complete system is currently being developed to allow owners to park their private vehicles without being in the vehicle. To prevent collisions with pedestrians and other vehicles, Ford is also trying to develop for its valuable customers the Obstacle Avoidance system, which automatically controls steering and braking.

What is the Process to Disable Check Rear Park Aid Mechanism?

To disable Check Rear Park Aid features.

  • Press the Setup key once the Rear Park Aid error/notification displays.
  • Reset the feature by pressing the Reset button.

Problems and Solutions for Check Rear Park Aid Error Messages

There is no parking space in the system


  • There may be a blockage of the sensors. It could be snow, ice, or dirt. A blocked sensor could cause the system to malfunction.
  • The parking space in which your vehicle is parked is too small to be parked safely.
  • Opposite side of the parking spot does not have enough space for parking maneuvers.
  • There is only availability of 5+ feet (1.5 m) or less than 2 feet (0.5 m) of parking space.
  • Parallel parking or perpendicular parking is permitted if the vehicle is traveling at more than 22 mph (35 km/h).
  • A new battery was recently installed in your vehicle. Following the reconnecting of the battery, you will need to drive for a very short period on straight road.

The system’s check rear park aid notification doesn’t position your vehicle correctly in the parking space.


  • There is an angle between your vehicle’s roll and its current transmission’s position. The vehicle will roll forward when it is in reverse.
  • The system can’t align your vehicle correctly if there is some irregular curb along with the parking space.
  • Objects or vehicles lining the curb may not be parked properly.
  • You may have backed up too far.
  • Your tires may not be properly inflated. The air is not inflated correctly, the size is incorrect, or the sizes are different.
  • Changing or repairing the device affects its ability to detect.
  • A parked vehicle is hard to detect. Salt sprayers, snowplows, or moving truck beds are examples of these items.
  • After your vehicle passes a parking space, the parking space’s length or position changes.
  • Your vehicle’s temperature changes immediately after passing a parking space. Leaving a heated garage, or returning from a car wash, in the cold can be challenging.

The system does not search for a parking space. (No need to check rear park aid message)


  • Traction controls might have turned off.
  • The reverse is selected on transmission. Parking space can only be detected when your vehicle moves forward.

As well as the cross-traffic warning, you keep getting the check rear park aid message that the park assist needs to be checked.


  • The proximity sensors in your vehicle are malfunctioning. Bring your vehicle to a dealer for a diagnostic test.
  • You should check the wires on the sensors if you have taken them off. If you have done repairing or are thinking of doing that, be sure it’s the right bumper, and none of the sensors have been damaged.

PS: The error message to check rear park aid varies from Vehicle to Vehicle, and the solution varies. Therefore, you need to look at all the possible solutions to avoid ambiguities.

What Else?

We have discussed the problems and solutions where one has to check rear park aid notifications on their vehicle. These errors are very common and need to be checked and amended immediately. Though our solutions are undoubtedly more than enough, each vehicle has its own pros and cons. It would be best to check your vehicle’s manual and act accordingly. This will make things easy and manageable for you, and this check rear park aid message won’t surely bother you.


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