my Tesla Model S Original (2012-2020) won't start and the dashboard lights are flashing what's wrong

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

1-2 hours

Time

medium

Difficulty

high

Severity

3 min read

458 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 a no-start condition in Tesla Model S (2012-2020). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Electrical

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect battery before working on electrical systems.
•Ensure the vehicle is powered off before performing any repairs or inspections.

Symptoms

•Dashboard lights flashing intermittently
•Vehicle does not start or respond
•No sound from the motor or accessories
•Electrical components may flicker or reset
•Potential error messages displayed on the screen

Diagnostic Steps

1
Check the 12V battery voltage using a multimeter.
2
Inspect the battery connections for corrosion or looseness.
3
Verify the status of the main battery pack through the Tesla app.
4
Attempt a soft reset of the vehicle by holding down the two scroll wheels on the steering wheel.
5
Scan for error codes using a compatible OBD-II scanner or Tesla diagnostic 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

•Multimeter
•Socket set
•Battery terminal cleaner

Parts Required

•12V battery (if replacement is necessary)

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Diagnostic Steps

1
Check the 12V battery voltage using a multimeter.
2
Inspect the battery connections for corrosion or looseness.
3
Verify the status of the main battery pack through the Tesla app.
4
Attempt a soft reset of the vehicle by holding down the two scroll wheels on the steering wheel.
5
Scan for error codes using a compatible OBD-II scanner or Tesla diagnostic tool.

Solution

1. Preparation

Gather necessary tools: multimeter, socket set, and a battery terminal cleaner.
Ensure the vehicle is in a safe, well-ventilated area.

2. Inspect the 12V Battery

Remove the front trunk cover to access the 12V battery.
Tools Required: Socket set
Check the battery voltage with the multimeter. It should read above 12.4 volts.
- If the voltage is low, proceed to charge or replace the battery.

3. Clean and Secure Battery Connections

Disconnect the negative terminal first, followed by the positive terminal.
- Safety Warning: Always disconnect the negative terminal first to prevent short circuits.
Clean the terminals using a battery terminal cleaner.
Reconnect the terminals securely, ensuring a tight fit.

4. Check Main Battery Status

Use the Tesla app to check the main battery's health and charge level.
If the main battery is low, connect the vehicle to a charger and allow it to charge fully.

5. Perform a Soft Reset

With the vehicle powered on, hold down both scroll wheels on the steering wheel until the touchscreen reboots.
Wait for the Tesla logo to appear before releasing the scroll wheels.