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

469 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 the negative battery terminal before working on electrical systems.
•Allow the vehicle to cool down before performing any maintenance.

Symptoms

•No response when pressing the brake pedal.
•Key fob not recognized by the vehicle.
•Touchscreen remains blank or unresponsive.
•Dashboard lights are off or flickering.
•Error messages displayed on the touchscreen (if it turns on).

Diagnostic Steps

1
Check the key fob battery and replace if necessary.
2
Verify that the vehicle is in 'Park' mode.
3
Inspect the 12V battery for charge level and connections.
4
Use the Tesla app to check for remote diagnostics and alerts.
5
Check for any software updates or fault codes through the touchscreen.
6
Perform a hard reset of the vehicle by holding down the scroll wheels on the steering wheel.

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
•Basic hand tools (screwdrivers, wrenches)

Parts Required

•New 12V battery (compatible with Tesla Model S)

Related Faults

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Diagnostic Steps

1
Check the key fob battery and replace if necessary.
2
Verify that the vehicle is in 'Park' mode.
3
Inspect the 12V battery for charge level and connections.
4
Use the Tesla app to check for remote diagnostics and alerts.
5
Check for any software updates or fault codes through the touchscreen.
6
Perform a hard reset of the vehicle by holding down the scroll wheels on the steering wheel.

Solution

1. Preparation

Tools Required: Multimeter, basic hand tools (screwdrivers, wrenches).
Ensure the vehicle is in a safe location with enough space for repair.

2. Check the 12V Battery

Sub-steps:
1. Open the front trunk to access the 12V battery.
2. Use a multimeter to measure the voltage of the 12V battery. It should be around 12.6V or higher.
3. If the voltage is below 12.0V, the battery is likely discharged.

3. Replace the 12V Battery

Sub-steps:
1. Disconnect the negative terminal first, followed by the positive terminal.
2. Remove any securing brackets or covers.
3. Replace the old battery with a new compatible 12V battery (such as an AGM battery).
4. Reconnect the positive terminal first, followed by the negative terminal.
5. Ensure all connections are tight and secure.

4. Reset the Vehicle

Sub-steps:
1. Within the vehicle, hold down both scroll wheels on the steering wheel until the touchscreen goes black and the Tesla logo appears.
2. Wait for the system to reboot completely.

5. Test the Vehicle

Sub-steps:
1. Attempt to start the vehicle again.
2. Ensure the key fob is within range and press the brake pedal.