why does my Tesla Model S Plaid/Refresh (2021-present) key fob not unlock doors

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

30 minutes

Time

medium

Difficulty

medium

Severity

3 min read

478 words

Problem Statement

Learn how to diagnose and fix key fob issues for Tesla Model S Plaid. Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Electrical

Estimated Time

30 minutes

⚠️ Safety Warnings

Important safety information - read before proceeding

•Ensure the vehicle is in a secure location while performing these steps to avoid accidental locking or unlocking.

Symptoms

•Key fob not responding to unlock button
•Doors do not unlock when the fob is nearby
•No LED light activation on the key fob when buttons are pressed
•Vehicle does not recognize the key fob for entry
•Inconsistent performance of the key fob with other functions (e.g., trunk opening)

Diagnostic Steps

1
Check the key fob battery level using a multimeter.
2
Inspect the key fob for physical damage or water ingress.
3
Verify that the vehicle's software is up to date through the Tesla app.
4
Test the key fob functionality by attempting to unlock the doors from different distances.
5
Try using the mobile app to unlock the vehicle to determine if the issue is with the key fob or the car itself.

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

•Small flathead screwdriver
•Multimeter
•Tesla mobile app

Parts Required

•CR2032 battery

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Diagnostic Steps

1
Check the key fob battery level using a multimeter.
2
Inspect the key fob for physical damage or water ingress.
3
Verify that the vehicle's software is up to date through the Tesla app.
4
Test the key fob functionality by attempting to unlock the doors from different distances.
5
Try using the mobile app to unlock the vehicle to determine if the issue is with the key fob or the car itself.

Solution

1. Battery Replacement

Tools Required: Small flathead screwdriver, CR2032 battery
Sub-steps:
1. Use the flathead screwdriver to gently pry open the key fob casing.
2. Remove the old battery and dispose of it properly.
3. Insert a new CR2032 battery, ensuring the positive side is facing up.
4. Snap the key fob casing back together securely.

2. Reprogram the Key Fob

Tools Required: Tesla mobile app
Sub-steps:
1. Open the Tesla mobile app and log in to your account.
2. Navigate to ‘Controls’ and select ‘Keys’.
3. Choose ‘Add Key’ and follow the on-screen instructions to reprogram the key fob.
4. Confirm the key fob is recognized by testing the unlock function.

3. Inspect and Reset Vehicle Systems

Tools Required: None
Sub-steps:
1. Power off the vehicle by selecting 'Safety' > 'Power Off' from the touchscreen.
2. Wait for at least 2 minutes before powering the vehicle back on.
3. Test the key fob functionality again to see if unlocking works.