my Tesla Model S Original (2012-2020) displays "key not recognized" what can I do?

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

30 minutes to 1 hour

Time

medium

Difficulty

high

Severity

3 min read

440 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 resolve the 'key not recognized' issue in Tesla Model S (2012-2020). Step-by-step guide with diagnostic steps and repair instructions.

Affected Component

Electrical

Estimated Time

30 minutes to 1 hour

⚠️ Safety Warnings

Important safety information - read before proceeding

•Handle the key fob carefully to avoid damage during battery replacement.

Symptoms

•Key not recognized message on the display
•Inability to start the vehicle
•Key fob buttons not functioning
•Key fob battery low warning
•Intermittent recognition of the key fob

Diagnostic Steps

1
Check the key fob battery level and replace if low.
2
Ensure the key fob is within proximity of the vehicle (approximately 1-3 feet).
3
Inspect the key fob for physical damage or water exposure.
4
Use another key fob (if available) to determine if the issue is with the original fob.
5
Perform a soft reset of the vehicle by pressing and holding the two scroll wheels on the steering wheel until the screen reboots.
6
Scan for any error messages using Tesla's built-in diagnostics or a Tesla service tool.

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
•Tesla mobile app

Parts Required

•CR2032 battery

Related Faults

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Diagnostic Steps

1
Check the key fob battery level and replace if low.
2
Ensure the key fob is within proximity of the vehicle (approximately 1-3 feet).
3
Inspect the key fob for physical damage or water exposure.
4
Use another key fob (if available) to determine if the issue is with the original fob.
5
Perform a soft reset of the vehicle by pressing and holding the two scroll wheels on the steering wheel until the screen reboots.
6
Scan for any error messages using Tesla's built-in diagnostics or a Tesla service tool.

Solution

1. Key Fob Battery Replacement

Sub-steps:
1. Use a small flathead screwdriver to gently pry open the key fob case.
2. Remove the old battery (CR2032) and insert a new one, ensuring the positive side is facing up.
3. Snap the key fob case back together securely.
Tools Required:
- Small flathead screwdriver
- New CR2032 battery

2. Reprogram Key Fob (if necessary)

Sub-steps:
1. Sit inside the vehicle with the new or functioning key fob.
2. Open the Tesla app on your smartphone and go to the 'Controls' section.
3. Select 'Key Fob' and follow the prompts to add or reprogram the key fob.
Tools Required:
- Tesla mobile app

3. Contact Tesla Service Center

Sub-steps:
1. If the key fob is still not recognized, contact Tesla customer service or schedule an appointment at a service center.
2. Provide them with details of the issue and any diagnostic steps taken.