my Tesla Model S Original (2012-2020) key fob not working what are the solutions

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

30 minutes to 1 hour

Time

medium

Difficulty

medium

Severity

3 min read

481 words

Problem Statement

Learn how to troubleshoot and fix a non-working key fob for Tesla Model S (2012-2020). Step-by-step guide with diagnostic steps and solutions.

Affected Component

Electrical

Estimated Time

30 minutes to 1 hour

⚠️ Safety Warnings

Important safety information - read before proceeding

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

Symptoms

•Key fob not detected by the vehicle
•Inability to unlock or lock the doors remotely
•Battery indicator on the key fob may be low or empty
•Physical buttons on the key fob are unresponsive
•Possible 'Key not detected' message on the vehicle's display

Diagnostic Steps

1
Check the battery level of the key fob using a multimeter or battery tester.
2
Inspect the key fob for any visible damage or wear.
3
Attempt to unlock the vehicle using the key fob while standing close to the door handle.
4
Try using the spare key fob if available to determine if the issue is with the primary fob.
5
Restart the vehicle's electronics by opening and closing the driver’s door and waiting a few minutes.
6
Check for software updates on the vehicle through the Tesla app or onboard 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

•Small flathead screwdriver
•Multimeter or battery tester

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 battery tester.
2
Inspect the key fob for any visible damage or wear.
3
Attempt to unlock the vehicle using the key fob while standing close to the door handle.
4
Try using the spare key fob if available to determine if the issue is with the primary fob.
5
Restart the vehicle's electronics by opening and closing the driver’s door and waiting a few minutes.
6
Check for software updates on the vehicle through the Tesla app or onboard system.

Solution

1. Battery Replacement

Open the Key Fob:
- Use a small flathead screwdriver to gently pry apart the two halves of the key fob.
- Be cautious to avoid damaging the casing.
Replace the Battery:
- Remove the old battery (typically a CR2032).
- Insert a new battery, ensuring the positive side is facing up.
Reassemble the Key Fob:
- Snap the two halves of the key fob back together, ensuring they fit snugly.

2. Reprogram the Key Fob

Access the Vehicle:
- Sit inside the Tesla Model S with the new battery installed in the key fob.
Reprogram the Fob:
- Go to the vehicle's touchscreen and navigate to "Controls."
- Select "Key Fob" and follow the prompts to add or reset the key fob.

3. Inspect and Repair (if necessary)

Examine Internal Components:
- If the key fob is still non-functional, inspect the internal electronic components for corrosion or loose connections.
Repair or Replace:
- If damage is found, consider repairing the internal components or replacing the key fob entirely.