how to fix the key fob not working for my Tesla Model S Plaid?

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

30 minutes

Time

medium

Difficulty

medium

Severity

3 min read

500 words

Problem Statement

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

Affected Component

Electrical

Estimated Time

30 minutes

⚠️ Safety Warnings

Important safety information - read before proceeding

•Ensure the vehicle is in a secure state before working on the key fob.

Symptoms

•Key fob not responding to button presses
•Vehicle not unlocking when approaching
•Unable to start the vehicle using the key fob
•Indicator lights on the key fob not illuminating
•Tesla app showing 'key not detected' message

Diagnostic Steps

1
Check the battery level of the key fob using a multimeter.
2
Replace the key fob battery if it is low or dead.
3
Attempt to reset the key fob by holding the key fob close to the vehicle's center console.
4
Verify that the vehicle's software is up to date by checking the settings in the Tesla app or the vehicle's touchscreen.
5
Test the key fob on another Tesla vehicle to determine if it’s a key fob issue or a vehicle issue.

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
•Multimeter

Parts Required

•CR2032 battery

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Diagnostic Steps

1
Check the battery level of the key fob using a multimeter.
2
Replace the key fob battery if it is low or dead.
3
Attempt to reset the key fob by holding the key fob close to the vehicle's center console.
4
Verify that the vehicle's software is up to date by checking the settings in the Tesla app or the vehicle's touchscreen.
5
Test the key fob on another Tesla vehicle to determine if it’s a key fob issue or a vehicle issue.

Solution

1. Preparation

Tools Required: Small flathead screwdriver, CR2032 battery (for key fob)
Safety Warnings: Ensure the vehicle is in a secure state before working on the key fob.

2. Replace the Key Fob Battery

Open the Key Fob:
- Use a small flathead screwdriver to gently pry open the key fob casing.
- Be careful not to damage the casing during this process.
Remove the Old Battery:
- Take note of the battery orientation (positive side facing up).
- Carefully remove the old CR2032 battery from its slot.
Install the New Battery:
- Insert the new CR2032 battery into the key fob, ensuring it’s in the correct orientation.
- Press down gently until it is securely in place.
Reassemble the Key Fob:
- Align the two halves of the key fob and press them together until they click.
- Ensure there are no gaps or misalignments in the casing.

3. Reset the Key Fob

Close Proximity Reset:
- Sit inside the Tesla Model S Plaid with the key fob.
- Hold the key fob flat against the vehicle’s center console for about 10 seconds to initiate a reset.
Test Functionality:
- Attempt to lock and unlock the vehicle using the key fob.
- Try starting the vehicle with the key fob present.