why does my Tesla Model S Original (2012-2020) have a weird smell when starting

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

572 words

Problem Statement

Learn how to diagnose and fix the weird smell on startup 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 battery before working on electrical systems.
•Ensure the vehicle is in a well-ventilated area while inspecting for odors.

Symptoms

•Unpleasant odor noticeable during startup
•Possible burning smell
•Smell of heated plastic or rubber
•Occasional electrical burning scent
•No warning lights illuminated on the dashboard

Diagnostic Steps

1
Inspect the cabin air filter for debris or contamination.
2
Check the condition of high-voltage cables and connections for signs of wear or damage.
3
Examine the frunk (front trunk) area for any foreign objects or fluids that may be causing the smell.
4
Use an OBD-II scanner to check for any hidden fault codes related to the electrical system.
5
Inspect the battery cooling system for any signs of coolant leaks or blockages.
6
Review the recent service history for any related repairs or maintenance.

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

•Torx screwdriver
•Vacuum cleaner
•Flashlight
•Torque wrench
•Coolant tester

Parts Required

•Cabin air filter (if replacement is necessary)

Related Faults

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Diagnostic Steps

1
Inspect the cabin air filter for debris or contamination.
2
Check the condition of high-voltage cables and connections for signs of wear or damage.
3
Examine the frunk (front trunk) area for any foreign objects or fluids that may be causing the smell.
4
Use an OBD-II scanner to check for any hidden fault codes related to the electrical system.
5
Inspect the battery cooling system for any signs of coolant leaks or blockages.
6
Review the recent service history for any related repairs or maintenance.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a flat surface with the parking brake engaged.
Disconnect the 12V battery to ensure safety while working on electrical components.

2. Inspect Cabin Air Filter

Tools Required: Torx screwdriver, vacuum cleaner.
Steps:
1. Locate the cabin air filter compartment, usually behind the glove box.
2. Remove the glove box by unscrewing the screws and gently pulling it out.
3. Take out the cabin air filter and inspect it for dirt and debris.
4. Clean the area with a vacuum cleaner and replace the filter if necessary.

3. Examine High-Voltage Cables

Tools Required: Visual inspection tools (flashlight).
Steps:
1. Open the frunk and visually inspect the high-voltage cables for signs of fraying, melting, or damage.
2. Ensure all connections are secure and free from corrosion.

4. Inspect Frunk Area

Tools Required: Visual inspection tools (flashlight).
Steps:
1. Look for any foreign objects, such as tools or debris, that may have been left in the frunk.
2. Check for any leaks or spills that could be causing the odor.

5. Verify Cooling System

Tools Required: Torque wrench, coolant tester.
Steps:
1. Inspect the coolant reservoir for proper fluid levels and look for signs of leaks.
2. If necessary, use a coolant tester to ensure proper coolant quality.
3. Tighten any loose connections (torque specifications may vary) and replace coolant if needed.

6. Reconnect Battery

Once all inspections and repairs are complete, reconnect the 12V battery.
Ensure all tools are removed from the vehicle and check for any loose parts.