my Tesla Model S Original (2012-2020) remote key fob isn't working how to fix it

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

15-30 minutes

Time

easy

Difficulty

medium

Severity

3 min read

458 words

Problem Statement

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

Affected Component

Electrical

Estimated Time

15-30 minutes

⚠️ Safety Warnings

Important safety information - read before proceeding

•None applicable for this procedure.

Symptoms

•Key fob is unresponsive to button presses
•Vehicle does not detect key fob when attempting to enter or start
•Indicator lights on the key fob do not illuminate
•Vehicle may display a 'Key Not Detected' message
•Battery low warning may be present on the vehicle display

Diagnostic Steps

1
Check the key fob battery: Open the key fob casing and inspect the battery for corrosion or low voltage.
2
Replace the battery: If the battery is low or dead, replace it and test the key fob functionality.
3
Inspect for physical damage: Examine the key fob for any signs of damage, such as cracks or water exposure.
4
Re-pair the key fob: If the fob battery is fine, attempt to re-pair the key fob with the vehicle using the Tesla app or vehicle settings.
5
Check vehicle software: Ensure that the vehicle's software is up to date, as outdated software may cause connectivity issues with the key fob.

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 flathead screwdriver
•Plastic prying tool

Parts Required

•CR2032 battery

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Diagnostic Steps

1
Check the key fob battery: Open the key fob casing and inspect the battery for corrosion or low voltage.
2
Replace the battery: If the battery is low or dead, replace it and test the key fob functionality.
3
Inspect for physical damage: Examine the key fob for any signs of damage, such as cracks or water exposure.
4
Re-pair the key fob: If the fob battery is fine, attempt to re-pair the key fob with the vehicle using the Tesla app or vehicle settings.
5
Check vehicle software: Ensure that the vehicle's software is up to date, as outdated software may cause connectivity issues with the key fob.

Solution

1. Preparation

Tools Required: Small flathead screwdriver or a plastic prying tool
Parts Required: CR2032 battery (for key fob replacement)
Safety Warnings: None applicable for this procedure.

2. Open Key Fob

Use the small flathead screwdriver or plastic prying tool to gently pry open the key fob casing.
Take care not to damage the casing during the removal process.

3. Replace Battery

Remove the old CR2032 battery from the key fob.
Insert the new CR2032 battery ensuring the correct polarity (positive side facing up).
Reassemble the key fob by snapping the casing back together securely.

4. Re-pair Key Fob (if necessary)

Inside the Tesla, go to the 'Controls' menu on the touchscreen.
Select 'Locks', and then tap ‘Add Key’ to enter pairing mode.
Follow the on-screen instructions while holding the key fob near the center console.