how to troubleshoot a key fob not working for my Tesla Model S

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

30 minutes

Time

medium

Difficulty

medium

Severity

3 min read

481 words

Problem Statement

Learn how to troubleshoot and fix a non-working key fob for your Tesla Model S. Step-by-step instructions for diagnosing and resolving key fob issues.

Affected Component

Electrical

Estimated Time

30 minutes

⚠️ Safety Warnings

Important safety information - read before proceeding

•None applicable for this task.

Symptoms

•Key fob not responding to button presses
•Vehicle does not recognize the key fob when attempting to unlock
•No LED light activation on the key fob when buttons are pressed
•Difficulty starting the vehicle using the key fob
•Notifications on the vehicle's display indicating key fob issues

Diagnostic Steps

1
Check the battery by replacing the key fob battery with a new CR2032 battery and test if it resolves the issue.
2
Inspect the key fob for physical damage, such as cracks or water exposure.
3
Try re-pairing the key fob with the vehicle by following the pairing instructions in the Tesla owner's manual.
4
Use the Tesla mobile app to unlock the vehicle to determine if it's a key fob-specific issue.
5
Connect the vehicle to a diagnostic tool to check for any error codes related to the key fob system.

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

•Flathead screwdriver
•New CR2032 battery

Parts Required

•CR2032 battery

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Check the battery by replacing the key fob battery with a new CR2032 battery and test if it resolves the issue.
2
Inspect the key fob for physical damage, such as cracks or water exposure.
3
Try re-pairing the key fob with the vehicle by following the pairing instructions in the Tesla owner's manual.
4
Use the Tesla mobile app to unlock the vehicle to determine if it's a key fob-specific issue.
5
Connect the vehicle to a diagnostic tool to check for any error codes related to the key fob system.

Solution

1. Preparation

Tools Required:
- Flathead screwdriver (for opening the key fob)
- New CR2032 battery
Safety Warnings: None applicable for this task.

2. Replace the Key Fob Battery

Sub-steps:
1. Use the flathead screwdriver to gently pry open the key fob casing.
2. Carefully remove the old CR2032 battery from the key fob.
3. Insert the new CR2032 battery, ensuring the positive (+) side is facing up.
4. Snap the key fob casing back together securely.

3. Re-pair the Key Fob

Sub-steps:
1. Enter the vehicle and ensure it is in park.
2. On the touchscreen, navigate to 'Controls' > 'Settings' > 'Key Fob'.
3. Follow the prompts to remove the existing key fob pairing.
4. After removal, select 'Add Key Fob' and follow the on-screen instructions.
5. When prompted, place the key fob on the designated area in the vehicle to complete the pairing process.

4. Test Functionality

Sub-steps:
1. Attempt to lock and unlock the vehicle using the key fob.
2. Try starting the vehicle to confirm that the key fob is recognized.