my Ford F-150 13th Generation (2015-2020) key fob won't unlock the doors

Ford F-150 13th Generation (2015-2020)

Error Codes

30 minutes

Time

easy

Difficulty

medium

Severity

2 min read

338 words

Problem Statement

Learn how to diagnose and fix key fob issues for Ford F-150 (2015-2020). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Electrical

Estimated Time

30 minutes

⚠️ Safety Warnings

Important safety information - read before proceeding

•Handle the battery with care to avoid short-circuiting.
•Dispose of the old battery properly.

Symptoms

•Key fob buttons do not respond
•Vehicle doors remain locked despite pressing the fob
•Indicator light on the fob does not illuminate when buttons are pressed
•Manual unlocking works but remote access does not
•Battery warning light on the dashboard (if applicable)

Diagnostic Steps

1
Inspect the key fob battery for corrosion or damage.
2
Replace the key fob battery with a new one.
3
Verify the key fob signal using an OBD-II scanner or key fob tester.
4
Check for any blown fuses related to the keyless entry system in the fuse box.
5
Reprogram the key fob if the battery replacement does not resolve the issue.

Solution

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

•Small flathead screwdriver
•New key fob battery (CR2032)
•Multimeter (optional)

Parts Required

•CR2032 battery

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Diagnostic Steps

1
Inspect the key fob battery for corrosion or damage.
2
Replace the key fob battery with a new one.
3
Verify the key fob signal using an OBD-II scanner or key fob tester.
4
Check for any blown fuses related to the keyless entry system in the fuse box.
5
Reprogram the key fob if the battery replacement does not resolve the issue.

Solution

1. Preparation

Gather necessary tools: small flathead screwdriver, new key fob battery (CR2032), and a multimeter (optional).
Ensure the vehicle is parked and the ignition is off.

2. Open the Key Fob

Use the small flathead screwdriver to gently pry open the key fob casing.
Start at the seam where the two halves meet and carefully work your way around.

3. Replace the Battery

Remove the old battery from the key fob.
Note the orientation of the battery (positive and negative sides).
Insert the new CR2032 battery in the same orientation.

4. Reassemble the Key Fob

Align the two halves of the key fob.
Press them together until they snap back into place securely.

5. Test the Key Fob

Stand near the vehicle and press the unlock button on the fob.
Verify that the vehicle doors unlock as expected.

Tools Required:

Small flathead screwdriver
Multimeter (optional for testing battery voltage)

Parts Required:

CR2032 battery (if needed)

Estimated Repair Time: 30 minutes

Safety Warnings:

Handle the battery with care to avoid short-circuiting. Dispose of the old battery properly.