how to fix my Tesla Model S Plaid/Refresh (2021-present) when it won't start

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

1-2 hours

Time

medium

Difficulty

high

Severity

3 min read

568 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 starting issues in Tesla Model S Plaid (2021-present). Step-by-step guide with symptoms, diagnostic steps, and solutions.

Affected Component

Electrical

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the 12V battery before working on electrical components to avoid shocks.
•Allow the vehicle to sit for a few minutes after turning off to avoid any electrical issues.

Symptoms

•Dashboard displays error messages or warnings
•Key fob not recognized or unresponsive
•No response when pressing the brake pedal or start button
•Blank screen or unresponsive touchscreen
•Clicking sounds when attempting to start
•Headlights or interior lights dim or flicker

Diagnostic Steps

1
Check key fob battery and replace if low or dead.
2
Ensure all doors are properly closed, as some systems may disable starting if doors are ajar.
3
Attempt to perform a soft reboot of the touchscreen by holding down the two scroll wheels on the steering wheel until the screen resets.
4
Inspect the 12V battery health using the Tesla mobile app or via the vehicle's settings.
5
Check for any software updates available through the vehicle settings.
6
Inspect the main battery pack for visible damage or issues.

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

•Tesla mobile app
•Multimeter
•Basic hand tools (if needed)

Parts Required

•CR2032 key fob battery
•Compatible 12V battery (if replacement is necessary)

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Diagnostic Steps

1
Check key fob battery and replace if low or dead.
2
Ensure all doors are properly closed, as some systems may disable starting if doors are ajar.
3
Attempt to perform a soft reboot of the touchscreen by holding down the two scroll wheels on the steering wheel until the screen resets.
4
Inspect the 12V battery health using the Tesla mobile app or via the vehicle's settings.
5
Check for any software updates available through the vehicle settings.
6
Inspect the main battery pack for visible damage or issues.

Solution

1. Preparation

Tools Required: Tesla mobile app, multimeter (for 12V battery), basic hand tools (if needed)
Ensure the vehicle is parked in a safe and accessible area.
Wear safety gloves and glasses as necessary.

2. Replace Key Fob Battery

Sub-steps:
1. Open the key fob by gently prying it apart using a small flathead screwdriver.
2. Remove the old battery and replace it with a new CR2032 battery, ensuring correct polarity.
3. Snap the fob back together securely.

3. Check and Replace 12V Battery

Sub-steps:
1. Open the front trunk (frunk) and locate the 12V battery compartment.
2. Use a multimeter to check the voltage of the 12V battery; it should read above 12.4V.
3. If the voltage is low, disconnect the negative terminal first, then the positive terminal.
4. Remove the old battery and replace it with a new 12V battery (ensure the replacement is compatible).
5. Reconnect the battery terminals, starting with the positive terminal followed by the negative terminal.

4. Perform a System Reset

Sub-steps:
1. With the vehicle in park, hold down the two scroll wheels on the steering wheel until the touchscreen resets.
2. Wait for the Tesla logo to appear, indicating the restart is complete.

5. Check for Software Updates

Sub-steps:
1. Access the vehicle's settings via the touchscreen.
2. Navigate to Software and check for any available updates.
3. If updates are available, follow prompts to install them.