how do I fix my 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

542 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 12V battery before working on electrical systems to avoid shock.
•Handle the key fob battery with care; dispose of old batteries properly.

Symptoms

•No response when pressing the brake pedal or start button
•Dashboard lights and displays may not illuminate
•"Vehicle is powering up" message appears but does not progress
•Key fob not recognized or unable to unlock the vehicle
•Clicking or no sound from the electric motor

Diagnostic Steps

1
Check the key fob battery and replace if necessary.
2
Ensure the vehicle is in "Park" mode; attempt to shift gears and back to "Park."
3
Inspect the 12V battery voltage using a multimeter (should be above 12.4 volts).
4
Scan for error codes using an OBD-II scanner to identify any fault codes.
5
Check for any software updates or notifications through the Tesla mobile app.
6
Inspect the main battery pack for any visible signs of damage or disconnection.

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
•OBD-II scanner
•Small flathead screwdriver

Parts Required

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

Related Faults

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Diagnostic Steps

1
Check the key fob battery and replace if necessary.
2
Ensure the vehicle is in "Park" mode; attempt to shift gears and back to "Park."
3
Inspect the 12V battery voltage using a multimeter (should be above 12.4 volts).
4
Scan for error codes using an OBD-II scanner to identify any fault codes.
5
Check for any software updates or notifications through the Tesla mobile app.
6
Inspect the main battery pack for any visible signs of damage or disconnection.

Solution

1. Preparation

Gather tools: multimeter, OBD-II scanner, and replacement key fob battery.
Ensure the vehicle is on a flat surface and in "Park" mode.
Disconnect the 12V battery negative terminal to ensure safety during inspection.

2. Inspect and Replace Key Fob Battery

Locate the key fob.
Use a small flathead screwdriver to carefully pry open the key fob casing.
Replace the old battery (typically a CR2032) with a new one, ensuring correct polarity.
Reassemble the key fob.

3. Check and Charge 12V Battery

Reconnect the 12V battery negative terminal.
Use a multimeter to measure the voltage. If below 12.4 volts, proceed to charge the battery.
If the battery is significantly drained, connect a compatible charger to the 12V battery and charge it for several hours.
After charging, recheck the voltage.

4. Reset Vehicle Systems

With the 12V battery connected, perform a soft reset by holding down the two scroll wheels on the steering wheel until the touchscreen reboots.
Wait for the vehicle to power up completely (may take up to a minute).

5. Verify Main Battery Connection

If the vehicle still does not start, check the main battery connections for any looseness or corrosion.
Ensure all high-voltage connections are secure and undamaged.
If necessary, consult professional assistance for high-voltage system checks.