my Tesla Model S Original (2012-2020) key fob not working how to fix it

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

30 minutes

Time

easy

Difficulty

medium

Severity

3 min read

446 words

Problem Statement

Learn how to fix a non-working key fob for Tesla Model S (2012-2020). Step-by-step guide for battery replacement and re-pairing instructions.

Affected Component

Electrical

Estimated Time

30 minutes

⚠️ Safety Warnings

Important safety information - read before proceeding

•Ensure the vehicle is turned off before working on the key fob.

Symptoms

•Key fob unresponsive when attempting to unlock or start the vehicle
•Battery indicator on the vehicle display shows 'Key fob battery low' or similar message
•Inability to use the mobile app to unlock the vehicle
•Physical button presses on the fob do not produce any response
•Vehicle does not recognize key fob when placed in the designated area

Diagnostic Steps

1
Check the battery level of the key fob using a multimeter.
2
Inspect the key fob for any physical damage or signs of wear.
3
Replace the key fob battery and test the fob again.
4
Attempt to re-pair the key fob with the vehicle using the vehicle's settings menu.
5
Verify that the vehicle's software is up to date.

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 screwdriver
•Multimeter
•Replacement battery (CR2032)

Parts Required

•CR2032 battery

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Symptoms

•Key fob unresponsive when attempting to unlock or start the vehicle

•Battery indicator on the vehicle display shows 'Key fob battery low' or similar message

•Inability to use the mobile app to unlock the vehicle

•Physical button presses on the fob do not produce any response

•Vehicle does not recognize key fob when placed in the designated area

Diagnostic Steps

1
Check the battery level of the key fob using a multimeter.
2
Inspect the key fob for any physical damage or signs of wear.
3
Replace the key fob battery and test the fob again.
4
Attempt to re-pair the key fob with the vehicle using the vehicle's settings menu.
5
Verify that the vehicle's software is up to date.

Solution

1. Preparation

Gather necessary tools: small screwdriver, replacement battery (CR2032).
Ensure the vehicle is in a safe location and powered off.

2. Open the Key Fob

Use a small screwdriver to gently pry open the key fob casing.
Be careful not to damage the casing or internal components.

3. Replace the Battery

Remove the existing battery from the key fob.
Insert the new CR2032 battery, ensuring the polarity (+/-) matches the original orientation.

4. Reassemble the Key Fob

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

5. Re-pair the Key Fob

Sit inside the vehicle with the new key fob.
Access the vehicle's touchscreen and navigate to 'Controls' > 'Locks'.
Select 'Add Key Fob' and follow the on-screen instructions to complete the pairing process.

6. Test the Key Fob

Test the key fob by attempting to unlock and start the vehicle to ensure functionality.