how to troubleshoot the rear sensors on Ford Explorer Sixth Generation (2020-present)

Ford Explorer Sixth Generation (2020-present)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

505 words

Problem Statement

Learn how to troubleshoot and fix rear parking sensors on Ford Explorer (2020-present). Step-by-step guide with diagnostic steps and repair instructions.

Affected Component

Electrical

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems to prevent shocks or shorts.

Symptoms

•Rear parking sensor warning light illuminated on the dashboard
•Continuous beeping sound when the vehicle is in reverse
•Inconsistent or no detection of objects behind the vehicle
•Rear camera display showing error messages
•Lack of audible alerts when nearing obstacles

Diagnostic Steps

1
Scan the vehicle's onboard computer using an OBD-II scanner for any fault codes related to the parking sensors.
2
Inspect the rear sensor harness for any visible damage, corrosion, or loose connections.
3
Check the alignment and cleanliness of the rear sensors; ensure there are no obstructions like dirt or ice.
4
Test the rear sensors individually using a multimeter to measure resistance and ensure they are functioning correctly.
5
Verify the operation of the rear control module to ensure it is receiving and processing input from the sensors.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•OBD-II scanner
•Multimeter
•Socket set
•Cleaning supplies (cloth, mild detergent)

Parts Required

•OEM rear parking sensor(s) (if faulty)
•Electrical tape or heat shrink tubing (for repairs)

Related Faults

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Diagnostic Steps

1
Scan the vehicle's onboard computer using an OBD-II scanner for any fault codes related to the parking sensors.
2
Inspect the rear sensor harness for any visible damage, corrosion, or loose connections.
3
Check the alignment and cleanliness of the rear sensors; ensure there are no obstructions like dirt or ice.
4
Test the rear sensors individually using a multimeter to measure resistance and ensure they are functioning correctly.
5
Verify the operation of the rear control module to ensure it is receiving and processing input from the sensors.

Solution

1. Preparation

Gather tools and safety gear.
Disconnect the negative battery terminal to prevent electrical shorts.
Tools Required: OBD-II scanner, multimeter, socket set, and cleaning supplies.

2. Inspect and Clean Sensors

Locate the rear parking sensors mounted in the bumper.
Use a cloth and mild detergent to clean the sensor surfaces.
Ensure that there is no debris or ice blocking the sensors' line of sight.

3. Repair or Replace Damaged Components

If the wiring harness shows damage:
- Disconnect the harness from the sensor.
- Use heat shrink tubing and solder to repair any frayed wires.
If sensors are found to be faulty:
- Remove the bumper cover (refer to vehicle service manual for specific procedures).
- Unscrew the damaged sensor from its mounting bracket.
- Replace with a new OEM sensor, ensuring it is securely fastened.

4. Reconnect and Test

Reconnect the wiring harness to the sensor or sensors replaced.
Reconnect the negative battery terminal.
Start the vehicle and check for error codes using the OBD-II scanner.

5. Functionality Check

Put the vehicle in reverse and test the rear sensors' functionality.
Listen for audible alerts and observe the sensor response to obstacles.