how to fix my Tesla Model S Plaid/Refresh (2021-present) that won’t start

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

1-2 hours

Time

medium

Difficulty

high

Severity

3 min read

535 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 diagnostic procedures and repair instructions.

Affected Component

Electrical

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the 12V battery before performing any electrical work.
•Avoid shorting battery terminals when working with battery connections.

Symptoms

•No response when pressing the brake pedal or start button
•Dashboard lights and display are not illuminating
•"Vehicle is powering up" message appears but does not progress
•Key fob or mobile app unable to unlock or start the vehicle
•Warning messages regarding battery or power systems may be displayed

Diagnostic Steps

1
Check the key fob battery and replace it if necessary.
2
Ensure the vehicle is in 'Park' mode.
3
Inspect the physical connections of the 12V battery; look for corrosion or loose terminals.
4
Use the Tesla app to check for any error messages or notifications.
5
Attempt a soft reset of the vehicle by holding down both scroll wheels on the steering wheel.
6
Verify the status of the main battery charge using the Tesla app.

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

•Tire iron
•Multimeter
•Socket set

Parts Required

•12V AGM battery

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Symptoms

•No response when pressing the brake pedal or start button

•Dashboard lights and display are not illuminating

•"Vehicle is powering up" message appears but does not progress

•Key fob or mobile app unable to unlock or start the vehicle

•Warning messages regarding battery or power systems may be displayed

Diagnostic Steps

1
Check the key fob battery and replace it if necessary.
2
Ensure the vehicle is in 'Park' mode.
3
Inspect the physical connections of the 12V battery; look for corrosion or loose terminals.
4
Use the Tesla app to check for any error messages or notifications.
5
Attempt a soft reset of the vehicle by holding down both scroll wheels on the steering wheel.
6
Verify the status of the main battery charge using the Tesla app.

Solution

1. Preparation

Gather necessary tools: Tire iron (for 12V battery access), Multimeter (for battery voltage test).
Ensure the vehicle is in a well-ventilated area.
Put on safety gloves and eyewear.

2. Inspect and Replace the 12V Battery

Access the 12V Battery:
- Open the front trunk of the vehicle.
- Remove any covers to reach the 12V battery.
Test the 12V Battery:
- Use a multimeter to measure the voltage of the 12V battery. A healthy battery should read around 12.6 volts.
- If the voltage is below 12.0 volts, the battery is likely discharged.
Disconnect the Battery:
- Use a socket set to disconnect the negative terminal first, followed by the positive terminal.
Replace the Battery:
- If necessary, replace the 12V battery with a new one that meets Tesla specifications (typically a 12V AGM battery).
- Reconnect the positive terminal first, followed by the negative terminal.

3. Perform a Power Cycle

Power Cycle the Vehicle:
- Close all doors and wait for 2-3 minutes to allow the vehicle to enter a dormant state.
- Press the brake pedal and then press the start button to see if the vehicle powers on.

4. Software Update (if applicable)

Check for Software Updates:
- If the vehicle powers on, check for any available software updates via the touchscreen.
- Install updates if prompted, as updates can sometimes resolve startup issues.