how to fix my Tesla Model S Original (2012-2020) not responding to key fob

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

1-2 hours

Time

medium

Difficulty

high

Severity

3 min read

512 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix the key fob not responding issue in Tesla Model S (2012-2020). Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Electrical

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Ensure the vehicle is in a safe location before performing any repairs or inspections.

Symptoms

•Key fob not unlocking the doors
•Vehicle does not start with the key fob present
•Key fob LED indicator not illuminating when buttons are pressed
•Poor or intermittent communication with the vehicle electronics
•Error messages related to keyless entry or fob detected on the dashboard

Diagnostic Steps

1
Check the key fob battery level using a multimeter or replace the battery.
2
Inspect the key fob for physical damage or signs of wear.
3
Attempt to reset the key fob by following the manufacturer's reset instructions.
4
Scan the vehicle's onboard computer for any error codes related to key fob or keyless entry systems using the Tesla service tools.
5
Verify the vehicle's software is up to date, as outdated software can affect key fob functionality.
6
Inspect the vehicle’s antenna and communication modules for damage or disconnection.

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
•Torx screwdriver set
•Multimeter

Parts Required

•CR2032 battery

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Diagnostic Steps

1
Check the key fob battery level using a multimeter or replace the battery.
2
Inspect the key fob for physical damage or signs of wear.
3
Attempt to reset the key fob by following the manufacturer's reset instructions.
4
Scan the vehicle's onboard computer for any error codes related to key fob or keyless entry systems using the Tesla service tools.
5
Verify the vehicle's software is up to date, as outdated software can affect key fob functionality.
6
Inspect the vehicle’s antenna and communication modules for damage or disconnection.

Solution

1. Key Fob Battery Replacement

Tools Required: Small flathead screwdriver, CR2032 battery
Carefully pry open the key fob casing with the flathead screwdriver.
Remove the old battery and replace it with a new CR2032 battery, ensuring the positive side is facing up.
Snap the key fob casing back together securely.

2. Key Fob Reset

Tools Required: None
With the key fob nearby, enter the vehicle and press the brake pedal.
On the touchscreen, go to "Controls" > "Service" > "Reset Key Fob."
Follow the on-screen instructions to complete the reset process.

3. Software Update

Tools Required: Tesla mobile app or Wi-Fi connection
Connect the vehicle to a Wi-Fi network.
On the touchscreen, go to "Software" and check for any available updates.
If an update is available, follow the prompts to download and install it.

4. Keyless Entry Antenna Inspection

Tools Required: Torx screwdriver set
Open the trunk and remove the interior trim panel to access the keyless entry antenna.
Inspect the antenna for corrosion, disconnection, or damage.
Reconnect or replace the antenna as necessary.