my Tesla Model S Original (2012-2020) won't unlock with the key fob, what do I do?

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

30 minutes

Time

medium

Difficulty

medium

Severity

3 min read

487 words

Problem Statement

Learn how to troubleshoot and fix key fob issues for Tesla Model S (2012-2020). Step-by-step guide with diagnostic steps and repair instructions.

Affected Component

Electrical

Estimated Time

30 minutes

⚠️ Safety Warnings

Important safety information - read before proceeding

•Handle tools carefully to avoid damaging the key fob casing.

Symptoms

•Key fob is unresponsive when attempting to unlock the vehicle
•Vehicle does not respond to key fob commands (lock/unlock)
•Red light on key fob does not illuminate when buttons are pressed
•Unable to access the vehicle manually using key fob
•Possible intermittent unlocking when in close proximity to the vehicle

Diagnostic Steps

1
Check the battery level of the key fob and replace if necessary.
2
Use the Tesla app to attempt unlock and check for connectivity issues.
3
Inspect the key fob for physical damage or water ingress.
4
Verify that the vehicle's software is up to date through the settings menu.
5
Test the vehicle's keyless entry system by trying to unlock the doors from different angles and distances.
6
Check for any error messages on the vehicle's display related to the key fob or entry system.

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
•CR2032 battery

Parts Required

•CR2032 battery

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Symptoms

•Key fob is unresponsive when attempting to unlock the vehicle

•Vehicle does not respond to key fob commands (lock/unlock)

•Red light on key fob does not illuminate when buttons are pressed

•Unable to access the vehicle manually using key fob

•Possible intermittent unlocking when in close proximity to the vehicle

Diagnostic Steps

1
Check the battery level of the key fob and replace if necessary.
2
Use the Tesla app to attempt unlock and check for connectivity issues.
3
Inspect the key fob for physical damage or water ingress.
4
Verify that the vehicle's software is up to date through the settings menu.
5
Test the vehicle's keyless entry system by trying to unlock the doors from different angles and distances.
6
Check for any error messages on the vehicle's display related to the key fob or entry system.

Solution

1. Key Fob Battery Replacement

Tools Required: Small flathead screwdriver, CR2032 battery
Instructions:
1. Use the flathead screwdriver to gently pry open the key fob casing at the seam.
2. Remove the old battery from the key fob, noting the orientation of the positive (+) side.
3. Insert the new CR2032 battery, ensuring it is positioned correctly.
4. Snap the key fob casing back together securely.

2. Re-Pair Key Fob with Vehicle

Tools Required: None
Instructions:
1. Sit inside the vehicle with the new battery installed in the key fob.
2. On the vehicle's touchscreen, go to 'Controls' > 'Locks'.
3. Tap 'Add Key' and follow the on-screen instructions.
4. Hold the key fob close to the center console while prompted to complete the pairing process.

3. Reset Vehicle's Keyless Entry System

Tools Required: None
Instructions:
1. Power off the vehicle by putting it in "Park" and then holding the brake pedal while pressing the "Power Off" button on the touchscreen.
2. Wait for at least 2 minutes before pressing the brake pedal to power the vehicle back on.
3. Test the key fob again to see if the unlocking function is restored.