How do you fix the backup sensor on your 2003 Ford Expedition?

To fix the backup sensor on your 2003 Ford Expedition, first check the wiring and connectors for any visible damage or corrosion. If everything looks good, use a diagnostic scanner to check for error codes related to the parking assist system. If the codes point to a faulty sensor, you may need to replace it; ensure you use a compatible part. Finally, test the system after repairs to ensure proper functionality.