Tesla Model S Original (2012-2020) why is there a burning smell coming from the car

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

579 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 to diagnose and fix burning smell issues in Tesla Model S (2012-2020). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Electrical

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Ensure the high voltage battery is disconnected before handling any electrical components.
•Always disconnect the negative terminal first to prevent shorts.
•Be cautious of moving parts when the motor is powered.
•Ensure the area is clear of bystanders before powering on the vehicle.

Symptoms

•Burning smell noticeable inside or outside the vehicle
•Possible smoke coming from the vehicle
•Warning lights illuminated on the dashboard (e.g., battery warning)
•Loss of power during acceleration
•Increased heat from the battery or electrical components
•Unusual noises from the motor or drivetrain

Diagnostic Steps

1
Inspect the vehicle visually for any signs of smoke or burnt components.
2
Check the vehicle's error codes using the Tesla service menu or diagnostic tool.
3
Verify battery temperature readings through the Tesla app or vehicle display.
4
Examine the wiring and connectors in the battery compartment for any damage or overheating signs.
5
Inspect the motor and drivetrain for unusual wear, overheating, or foreign objects.
6
Review the vehicle’s maintenance history for any recent repairs or modifications.

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

•Socket set
•Screwdriver
•Wire brush
•Baking soda
•Wrench
•Multimeter

Parts Required

•Replacement wiring or connectors (if damaged)

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Symptoms

•Burning smell noticeable inside or outside the vehicle

•Possible smoke coming from the vehicle

•Warning lights illuminated on the dashboard (e.g., battery warning)

•Loss of power during acceleration

•Increased heat from the battery or electrical components

•Unusual noises from the motor or drivetrain

Diagnostic Steps

1
Inspect the vehicle visually for any signs of smoke or burnt components.
2
Check the vehicle's error codes using the Tesla service menu or diagnostic tool.
3
Verify battery temperature readings through the Tesla app or vehicle display.
4
Examine the wiring and connectors in the battery compartment for any damage or overheating signs.
5
Inspect the motor and drivetrain for unusual wear, overheating, or foreign objects.
6
Review the vehicle’s maintenance history for any recent repairs or modifications.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a flat surface and powered off.
Disconnect the high voltage battery for safety.

2. Inspect Wiring and Connectors

Sub-steps:
- Remove the battery compartment cover using a socket set.
- Visually inspect all wiring harnesses and connectors for signs of melting or charring.
- If any damaged components are found, disconnect and replace them.
Tools Required: Socket set, screwdriver.
Safety Warning: Ensure the high voltage battery is disconnected before handling any electrical components.

3. Check and Clean Battery Connections

Sub-steps:
- Disconnect the battery terminals (negative first, then positive).
- Clean any corrosion on the terminals with a wire brush and a mixture of baking soda and water.
- Reconnect the terminals securely and torque them to manufacturer specifications.
Tools Required: Wire brush, baking soda, wrench.
Safety Warning: Always disconnect the negative terminal first to prevent shorts.

4. Inspect and Test the Motor

Sub-steps:
- Remove the cover from the motor compartment.
- Check for any debris or obstructions in the motor area.
- Test the motor using a multimeter to ensure it is operating within specified resistance ranges.
Tools Required: Multimeter, socket set.
Safety Warning: Be cautious of moving parts when the motor is powered.

5. Reconnect and Perform a System Check

Sub-steps:
- Reconnect the high voltage battery and ensure all components are securely fastened.
- Power on the vehicle and monitor for any error messages or warnings.
- Conduct a test drive to check for any unusual smells or performance issues.
Tools Required: None.
Safety Warning: Ensure the area is clear of bystanders before powering on the vehicle.