how to troubleshoot 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

570 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 troubleshoot and fix starting issues in Tesla Model S (2012-2020). Step-by-step guide with diagnostic steps 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 components to avoid shock or damage.
•Follow proper disposal methods for batteries to prevent environmental hazards.

Symptoms

•Vehicle displays 'Powering On' message but does not start
•No response when pressing the brake pedal or turning the key fob
•Dash lights and screens remain unresponsive
•'Vehicle Needs Service' warning message may appear
•High-energy consumption display prior to failure (if applicable)

Diagnostic Steps

1
Check the battery charge level using the Tesla app or onboard display.
2
Ensure the key fob is functioning properly and is within proximity to the vehicle.
3
Inspect the 12V battery for any signs of damage or low voltage using a multimeter.
4
Perform a reset of the vehicle's systems by holding down the steering wheel scroll buttons until the touchscreen resets.
5
Connect to the vehicle's diagnostic system using Tesla's service tools or a compatible OBD-II scanner to check for error codes.
6
Inspect for any blown fuses related to the starting system in the main fuse box.

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
•Socket set
•Portable jump starter (optional)

Parts Required

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

Related Faults

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Diagnostic Steps

1
Check the battery charge level using the Tesla app or onboard display.
2
Ensure the key fob is functioning properly and is within proximity to the vehicle.
3
Inspect the 12V battery for any signs of damage or low voltage using a multimeter.
4
Perform a reset of the vehicle's systems by holding down the steering wheel scroll buttons until the touchscreen resets.
5
Connect to the vehicle's diagnostic system using Tesla's service tools or a compatible OBD-II scanner to check for error codes.
6
Inspect for any blown fuses related to the starting system in the main fuse box.

Solution

1. Preparation

Ensure the vehicle is in a safe, flat area.
Gather necessary tools: multimeter, OBD-II scanner, basic hand tools (socket set, screwdrivers).
Disconnect the vehicle from any charging source.

2. Battery Inspection

Remove the trunk liner to access the 12V battery.
Tools Required: Socket set.
Sub-steps:
- Check voltage across the 12V battery terminals; it should read above 12.4V.
- If voltage is low, attempt to jump-start the battery using a portable jump starter or connect to a charger.
- If the battery is dead or visually damaged, replace the 12V battery with a new one (ensure it meets OEM specifications).

3. Key Fob Check

Verify the battery in the key fob is functional.
If necessary, replace the key fob battery and attempt to start the vehicle again.

4. System Reset

If the vehicle is still unresponsive, perform a system reset:
- Hold down both scroll wheels on the steering wheel until the touchscreen goes black, then release.
- Wait for the Tesla logo to reappear before attempting to start the vehicle again.

5. Diagnostic Follow-Up

After performing the above steps, use the OBD-II scanner to check for any lingering error codes.
Sub-steps:
- Note any error codes and research them for specific solutions.
- Clear any error codes and attempt to start the vehicle again.