my Tesla Model S Original (2012-2020) has a burning smell what could it be

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

597 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 burning smell in Tesla Model S (2012-2020). Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Electrical

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Allow the vehicle to cool down before performing inspections or repairs.

Symptoms

•Burning smell inside or outside the vehicle
•Warning lights illuminated on the dashboard
•Reduced performance or power loss
•Unusual sounds from the motor or battery
•Smoke or heat visible from under the hood or near the battery

Diagnostic Steps

1
Check for any visible signs of smoke, burnt wires, or overheated components under the hood and around the battery area.
2
Use a diagnostic tool to scan the vehicle’s onboard computer for any error codes that may indicate electrical or mechanical issues.
3
Use a thermal imaging camera or infrared thermometer to assess the temperature of the battery pack and surrounding components.
4
Examine all electrical connections and wiring for signs of damage, corrosion, or loose connections.
5
Inspect all fluid levels, including coolant and brake fluid, to ensure they are within normal operating ranges.
6
Conduct a short test drive to replicate the burning smell and monitor for any performance issues or warning lights.

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

•OBD-II scanner
•Thermal imaging camera
•Basic hand tools (screwdrivers, pliers)

Parts Required

•Replacement wiring (if damaged)
•Electrical connectors
•Hoses or seals (if leaking)

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Diagnostic Steps

1
Check for any visible signs of smoke, burnt wires, or overheated components under the hood and around the battery area.
2
Use a diagnostic tool to scan the vehicle’s onboard computer for any error codes that may indicate electrical or mechanical issues.
3
Use a thermal imaging camera or infrared thermometer to assess the temperature of the battery pack and surrounding components.
4
Examine all electrical connections and wiring for signs of damage, corrosion, or loose connections.
5
Inspect all fluid levels, including coolant and brake fluid, to ensure they are within normal operating ranges.
6
Conduct a short test drive to replicate the burning smell and monitor for any performance issues or warning lights.

Solution

1. Preparation

Required Tools: OBD-II scanner, thermal imaging camera, basic hand tools (screwdrivers, pliers).
Disconnect the vehicle’s main battery to ensure safety while working on electrical systems.
Allow the vehicle to cool down before beginning repairs.

2. Inspect and Repair Wiring

Sub-steps:
1. Remove any protective covers to access wiring harnesses.
2. Visually inspect all wiring for signs of fraying, melting, or corrosion.
3. Repair or replace any damaged wiring using appropriate gauge wire and connectors.
4. Ensure all connections are secure and insulated to prevent short circuits.

3. Battery Inspection

Sub-steps:
1. Carefully remove the battery cover as per manufacturer guidelines.
2. Inspect the battery pack for any signs of damage or overheating.
3. Check for any loose connections or corrosion at the terminals.
4. If any modules are damaged, follow the manufacturer’s instructions for replacement.

4. Fluid Leak Repair

Sub-steps:
1. Identify the source of any fluid leaks (coolant, brake fluid, etc.).
2. Replace any damaged hoses or seals to prevent further leaks.
3. Refill fluids to the appropriate levels as specified in the owner’s manual.

5. Reassemble and Test

Sub-steps:
1. Reinstall all covers and components that were removed during inspection.
2. Reconnect the main battery and ensure all electrical systems are functioning.
3. Perform a test drive to confirm that the burning smell no longer occurs.