how to fix a Tesla Model S Original (2012-2020) that won't start

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

1-2 hours

Time

medium

Difficulty

high

Severity

3 min read

555 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 diagnostic procedures and repair instructions.

Affected Component

Electrical

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the vehicle from charging before working on electrical systems.
•Ensure the vehicle is in 'Park' to avoid any accidental movement while performing repairs.

Symptoms

•No response from the vehicle when the start button is pressed
•Instrument cluster remains dark
•Key fob not recognized
•Clicking sound from the front of the vehicle
•Error messages displayed on the touchscreen (if any)
•Vehicle not charging or showing low battery indicator

Diagnostic Steps

1
Check the key fob battery and ensure it is functional.
2
Verify that the vehicle's 12V battery is charged and functioning properly.
3
Inspect the main battery pack for any error messages or fault codes via the Tesla app or vehicle interface.
4
Scan the vehicle’s systems for error codes using a Tesla diagnostic tool.
5
Check for any signs of damage or corrosion at the battery terminals and wiring connections.
6
Perform a soft reset of the vehicle by holding down the two scroll wheels on the steering wheel until the touchscreen resets.

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
•Jumper cables
•Tesla diagnostic tool

Parts Required

•12V battery
•Key fob battery (CR2032)

Related Faults

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Diagnostic Steps

1
Check the key fob battery and ensure it is functional.
2
Verify that the vehicle's 12V battery is charged and functioning properly.
3
Inspect the main battery pack for any error messages or fault codes via the Tesla app or vehicle interface.
4
Scan the vehicle’s systems for error codes using a Tesla diagnostic tool.
5
Check for any signs of damage or corrosion at the battery terminals and wiring connections.
6
Perform a soft reset of the vehicle by holding down the two scroll wheels on the steering wheel until the touchscreen resets.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure you are in a safe working environment.
Disconnect the vehicle from charging if connected.

2. Inspect Key Fob

Sub-steps:
- Replace the battery in the key fob if it is weak or dead (usually a CR2032 battery).
- Re-test the key fob functionality by attempting to unlock and start the vehicle.

3. Check 12V Battery

Sub-steps:
- Open the front trunk (frunk) and locate the 12V battery.
- Use a multimeter to measure the voltage; it should be around 12.6V or higher.
- If the voltage is low, jump-start or replace the 12V battery.
Tools Required: Multimeter, jumper cables, replacement 12V battery (if needed).

4. Inspect Main Battery Pack

Sub-steps:
- Use the Tesla app or vehicle interface to check battery status and any error messages.
- If the battery is completely depleted, connect the vehicle to a charger and allow it to charge for a minimum of 30 minutes.

5. Reset Vehicle Systems

Sub-steps:
- Perform a soft reset by holding down the two scroll wheels on the steering wheel until the touchscreen goes black and reboots.
- If the issue persists, consider performing a more thorough factory reset through the settings menu, ensuring to back up any data first.