why is my Tesla Model S Original (2012-2020) key fob not working

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

30 minutes to 1 hour

Time

medium

Difficulty

medium

Severity

3 min read

434 words

Problem Statement

Learn how to diagnose and fix a non-working key fob for Tesla Model S (2012-2020). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Electrical

Estimated Time

30 minutes to 1 hour

⚠️ Safety Warnings

Important safety information - read before proceeding

•Handle batteries with care; dispose of old batteries according to local regulations.

Symptoms

•Key fob not responding to button presses
•Vehicle not unlocking when approaching with the key fob
•Unable to start the vehicle using the key fob
•Battery indicator on the vehicle displays low key fob battery
•Intermittent functioning of the key fob

Diagnostic Steps

1
Check the battery level of the key fob using a multimeter or battery tester.
2
Inspect the key fob for any physical damage, such as cracks or water intrusion.
3
Attempt to reprogram the key fob using the Tesla mobile app or vehicle settings.
4
Verify if other key fobs (if available) are functioning properly.
5
Check the vehicle's software for any updates that may affect key fob functionality.
6
Inspect the keyless entry system components for any faults or damage.

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 or plastic opening tool
•Multimeter or battery tester

Parts Required

•CR2032 battery (for key fob)

Related Faults

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Diagnostic Steps

1
Check the battery level of the key fob using a multimeter or battery tester.
2
Inspect the key fob for any physical damage, such as cracks or water intrusion.
3
Attempt to reprogram the key fob using the Tesla mobile app or vehicle settings.
4
Verify if other key fobs (if available) are functioning properly.
5
Check the vehicle's software for any updates that may affect key fob functionality.
6
Inspect the keyless entry system components for any faults or damage.

Solution

1. Battery Replacement

Open the key fob using a small flathead screwdriver or a plastic opening tool.
Remove the old battery (CR2032) and replace it with a new one, ensuring the positive side is facing up.
Reassemble the key fob securely.

2. Reprogram Key Fob

Sit inside the vehicle with the new battery installed in the key fob.
On the touchscreen, navigate to 'Controls' > 'Locks'.
Select 'Add Key' or 'Program Key' and follow the on-screen instructions.
Confirm that the key fob is recognized by the vehicle.

3. Inspect and Clean Key Fob Contacts

Open the key fob again and inspect the battery contacts for corrosion or dirt.
Clean the contacts with isopropyl alcohol and a cotton swab.
Reassemble the key fob and test for functionality.