my Ford Explorer Sixth Generation (2020-present) won't recognize the key fob what to check

Ford Explorer Sixth Generation (2020-present)

Error Codes

1-2 hours

Time

medium

Difficulty

high

Severity

3 min read

479 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix key fob recognition issues in the 2020 Ford Explorer. Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Electrical

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Ensure the vehicle is off before working on the key fob or electrical components.

Symptoms

•Key fob not detected by the vehicle
•Engine will not start
•Remote locking/unlocking features inoperative
•Physical key works but electronic functions do not
•"Key not detected" warning message on the dashboard

Diagnostic Steps

1
Check the battery in the key fob for charge and proper installation.
2
Verify that the key fob is within the effective range of the vehicle.
3
Inspect the key fob for physical damage or wear.
4
Use an OBD-II scanner to check for any related error codes.
5
Test the vehicle’s keyless entry system to ensure it's functioning correctly.
6
Reset the key fob by following the manufacturer’s procedures.

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

•Flathead screwdriver
•Replacement key fob battery (CR2032)
•OBD-II scanner

Parts Required

•Replacement key fob battery (CR2032)

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Diagnostic Steps

1
Check the battery in the key fob for charge and proper installation.
2
Verify that the key fob is within the effective range of the vehicle.
3
Inspect the key fob for physical damage or wear.
4
Use an OBD-II scanner to check for any related error codes.
5
Test the vehicle’s keyless entry system to ensure it's functioning correctly.
6
Reset the key fob by following the manufacturer’s procedures.

Solution

1. Preparation

Gather tools: flathead screwdriver, replacement key fob battery (CR2032), OBD-II scanner.
Ensure the vehicle is in a safe location and the engine is off.

2. Check Key Fob Battery

Sub-steps:
1. Open the key fob using a flathead screwdriver.
2. Remove the old battery and replace it with a new CR2032 battery, ensuring correct polarity.
3. Reassemble the key fob.
Tools Required: Flathead screwdriver, new battery (CR2032).

3. Inspect Key Fob and Vehicle Systems

Sub-steps:
1. Examine the key fob for cracks or damage that may affect its functionality.
2. Inspect the vehicle's keyless entry system for any visible issues, such as damaged antennas or wiring.
3. Check fuses related to the keyless entry system in the fuse box.
Tools Required: None.

4. OBD-II Scan and Reset

Sub-steps:
1. Connect the OBD-II scanner to the vehicle's diagnostic port.
2. Scan for error codes related to the key fob or security system.
3. If errors are found, clear them and attempt to start the vehicle again.
Tools Required: OBD-II scanner.

5. Key Fob Reset

Sub-steps:
1. Follow the manufacturer's instructions to reset the key fob and reprogram it if necessary.
2. This typically involves a sequence of actions such as turning the ignition on and off while pressing buttons on the key fob.
Tools Required: None.