how to troubleshoot Tesla Model S Original (2012-2020) key fob issues

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

30 minutes – 1 hour

Time

medium

Difficulty

medium

Severity

3 min read

459 words

Problem Statement

Learn how to troubleshoot key fob issues in Tesla Model S (2012-2020). Step-by-step guide with symptoms, diagnostic steps, and repair solutions.

Affected Component

Electrical

Estimated Time

30 minutes – 1 hour

⚠️ Safety Warnings

Important safety information - read before proceeding

•Be cautious when opening the key fob to avoid damaging internal components.

Symptoms

•Key fob not detected by the vehicle
•Difficulty locking or unlocking the doors remotely
•Inability to start the vehicle
•Battery indicator light on key fob is low or dead
•Intermittent connectivity with the vehicle

Diagnostic Steps

1
Check the key fob battery level using a battery tester or by observing the fob's response.
2
Attempt to reprogram the key fob through the vehicle's settings menu.
3
Inspect for physical damage to the key fob or water intrusion.
4
Look for interference from other electronic devices or key fobs nearby.
5
Scan the vehicle's system for any related error codes using an OBD-II scanner.

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
•Tesla mobile app
•Vehicle touchscreen
•OBD-II scanner
•Battery tester

Parts Required

•CR2032 battery

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Diagnostic Steps

1
Check the key fob battery level using a battery tester or by observing the fob's response.
2
Attempt to reprogram the key fob through the vehicle's settings menu.
3
Inspect for physical damage to the key fob or water intrusion.
4
Look for interference from other electronic devices or key fobs nearby.
5
Scan the vehicle's system for any related error codes using an OBD-II scanner.

Solution

1. Key Fob Battery Replacement

Tools Required: Small flathead screwdriver, CR2032 battery
Open the key fob using the small flathead screwdriver to gently pry apart the casing.
Remove the old battery and insert the new CR2032 battery, ensuring the positive (+) side is facing up.
Snap the key fob casing back together securely.

2. Reprogram Key Fob

Tools Required: Tesla mobile app or vehicle touchscreen
Access the vehicle settings via the touchscreen.
Navigate to "Locks" and select "Key Fob."
Follow the prompts to remove the old key fob and add the new one.
Confirm successful programming on the touchscreen.

3. Inspect Key Fob for Damage

Check for cracks or broken parts in the key fob casing.
If damage is noted, consider replacing the entire key fob.
Ensure that the fob is clean and free of debris or moisture.

4. Test for Electronic Interference

Move away from other electronic devices, such as cell phones or nearby key fobs.
Attempt to use the key fob again to see if functionality improves.