why does my Tesla Model S Original (2012-2020) key fob not unlock the doors?

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

30 minutes

Time

medium

Difficulty

medium

Severity

3 min read

436 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 the key fob carefully to avoid damaging the internal circuitry.

Symptoms

•Key fob buttons unresponsive
•Vehicle does not recognize the key fob nearby
•"Key not detected" message on the dashboard
•Doors remain locked despite pressing the unlock button
•Battery indicator on the fob may be low or dead

Diagnostic Steps

1
Inspect the key fob for physical damage or signs of wear.
2
Check the battery level of the key fob and replace it if necessary.
3
Attempt to unlock the vehicle using the mobile app to determine if the issue is with the fob or the car itself.
4
Verify if other key fobs (if available) experience similar issues.
5
Scan the vehicle for any error codes related to the keyless entry system using Tesla's diagnostic tools.
6
Reset the key fob by removing the battery and reinserting it after a few seconds.

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

Parts Required

•CR2032 battery (if replacement is necessary)

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Diagnostic Steps

1
Inspect the key fob for physical damage or signs of wear.
2
Check the battery level of the key fob and replace it if necessary.
3
Attempt to unlock the vehicle using the mobile app to determine if the issue is with the fob or the car itself.
4
Verify if other key fobs (if available) experience similar issues.
5
Scan the vehicle for any error codes related to the keyless entry system using Tesla's diagnostic tools.
6
Reset the key fob by removing the battery and reinserting it after a few seconds.

Solution

1. Battery Replacement

Sub-steps:
1. Use a small flathead screwdriver to gently pry open the key fob casing.
2. Remove the old battery (typically a CR2032).
3. Insert a new CR2032 battery with the positive (+) side facing up.
4. Reassemble the key fob casing securely.

2. Key Fob Re-Pairing

Sub-steps:
1. Inside the vehicle, go to the 'Controls' menu on the touchscreen.
2. Select 'Locks' and then 'Key Fob'.
3. Follow the prompts to add or re-pair the key fob.
4. Ensure the key fob is placed in the center console area during the pairing process.

3. Troubleshooting Key Fob Signal

Sub-steps:
1. Ensure there are no nearby devices that may cause signal interference (e.g., other electronic devices).
2. Move the key fob closer to the vehicle’s center console while pressing the unlock button.
3. Test the fob at various distances and angles from the vehicle.