how to resolve Tesla Model S Original (2012-2020) remote key issues

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

440 words

Problem Statement

Learn how to resolve remote key fob issues for Tesla Model S (2012-2020). Step-by-step guide for diagnostics and repair procedures.

Affected Component

Electrical

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Ensure the vehicle is powered off and in a safe state before working on the key fob.

Symptoms

•Remote key fob not responding to lock or unlock commands
•Inconsistent or intermittent key fob functionality
•Key not detected warning on the dashboard
•Difficulty starting the vehicle
•Reduced range of key fob operation

Diagnostic Steps

1
Check the battery level of the key fob using a multimeter or replace the battery with a new one.
2
Verify the key fob’s proximity to the vehicle; ensure it's within the operational range.
3
Inspect the key fob for physical damage or signs of wear.
4
Perform a reset of the vehicle’s key fob system through the vehicle settings.
5
Use the Tesla app to check for any software updates or issues with the vehicle’s connectivity.
6
Scan the vehicle for any error codes related to the keyless entry system 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

•Multimeter
•Thin prying tool
•OBD-II scanner

Parts Required

•CR2032 battery

Related Faults

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Diagnostic Steps

1
Check the battery level of the key fob using a multimeter or replace the battery with a new one.
2
Verify the key fob’s proximity to the vehicle; ensure it's within the operational range.
3
Inspect the key fob for physical damage or signs of wear.
4
Perform a reset of the vehicle’s key fob system through the vehicle settings.
5
Use the Tesla app to check for any software updates or issues with the vehicle’s connectivity.
6
Scan the vehicle for any error codes related to the keyless entry system using an OBD-II scanner.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is in a well-ventilated area and parked safely.
Disconnect the vehicle from charging if connected.

2. Replace Key Fob Battery

Sub-steps:
1. Open the key fob by inserting a thin tool into the seam and gently prying it open.
2. Remove the old battery (typically a CR2032) and dispose of it properly.
3. Insert a new battery, ensuring the positive side is facing up.
4. Snap the key fob back together securely.

3. Reset Key Fob System

Sub-steps:
1. Enter the vehicle and ensure all doors are closed.
2. Go to "Controls" > "Locks" on the touchscreen.
3. Select “Reset Key Fob” and follow the on-screen instructions.
4. Confirm that the key fob is recognized after the reset process.

4. Check for Software Updates

Sub-steps:
1. On the touchscreen, navigate to “Software.”
2. Check for any available updates and follow the prompts to install them if necessary.
3. After updates, test the key fob to see if functionality is restored.

5. Reprogram Key Fob (if necessary)

Sub-steps:
1. If the key fob still does not work, access the vehicle's service menu.
2. Select “Keys” and choose “Add Key.”
3. Follow the on-screen prompts to reprogram the fob.
4. Test the key fob again after programming.

Tools Required:

Multimeter
Thin prying tool
OBD-II scanner (optional)

Parts Required:

CR2032 battery (or compatible for key fob)

Estimated Repair Time: 1-2 hours

Safety Warnings:

Ensure the vehicle is powered off and in a safe state before working on the key fob.