Reverse Braking Assist – Troubleshooting - Reverse Braking Assist – Frequently Asked Questions

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Reverse Braking Assist – Frequently Asked Questions

Why is reverse brake assist unavailable?

Make sure the reverse brake assist is on. See Switching Reverse Braking Assist On and Off.
Make sure that all doors, liftgate or tailgate and hood are closed. Drive the vehicle on a straight road for a short period. If the message remains, have the system checked.
If your vehicle has the cross traffic alert system, make sure it is on. See Switching Cross Traffic Alert On and Off.
Make sure the rear parking aid system is on. See Parking Aids.

Make sure the traction control is on. See Switching Traction Control On and Off .

Your vehicle may have sustained a rear end impact. Have the sensors checked for proper coverage and operation.

An anti-lock brake, traction control or stability control event may have occurred. Reverse brake assist resumes operation when the event is complete.

Make sure the rear view camera and 360 degree camera are not dirty or obstructed. If dirty, clean the camera. If the message still appears after cleaning the camera, wait a short time for the message to clear. If the message does not clear, have the system checked.

Make sure the cross traffic alert, rear parking aid and side parking aid sensors are not blocked or faulty. See Locating the Cross Traffic Alert Sensors. See Locating the Rear Parking Aid Sensors. See Locating the Side Parking Aid Sensors.

You recently had your vehicle serviced, or the battery disconnected. Drive your vehicle a short distance to resume system operation.

Reverse brake assist does not function when you connect a trailer. Operation resumes when you disconnect the trailer.

Note: If the answers to why the system is unavailable do not assist in returning reverse brake assist to available, have the system checked as soon as possible.

2021 Mustang Mach-E Owner's Manual