why does my Tesla Model S Original (2012-2020) have a burnt smell from the engine?

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

475 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

Discover the causes and solutions for burnt smell from the engine in Tesla Model S (2012-2020). Step-by-step diagnostic and repair guide included.

Affected Component

Electrical

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Always disconnect the high-voltage battery before working on electrical systems.
•Use insulated tools to prevent electrical shock when handling high-voltage components.

Symptoms

•Burnt odor noticeable inside or outside the vehicle
•Possible overheating warning on the instrument cluster
•Unusual sounds from the electric motor or components
•Decreased performance or reduced acceleration
•Visible signs of smoke or melted plastic around electric components

Diagnostic Steps

1
Inspect the engine compartment for any visible signs of burnt components or wiring.
2
Use an OBD-II scanner to check for any error codes related to the electric powertrain or battery system.
3
Check the coolant levels and inspect for leaks in the cooling system.
4
Examine the high-voltage wiring harness for signs of wear or damage.
5
Verify the operation of the battery management system and cooling fans.

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
•Multimeter
•Socket set
•Screwdrivers

Parts Required

•Electrical wiring harness (if damaged)
•Battery cooling fans (if faulty)
•Connectors and terminals (as needed)

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Diagnostic Steps

1
Inspect the engine compartment for any visible signs of burnt components or wiring.
2
Use an OBD-II scanner to check for any error codes related to the electric powertrain or battery system.
3
Check the coolant levels and inspect for leaks in the cooling system.
4
Examine the high-voltage wiring harness for signs of wear or damage.
5
Verify the operation of the battery management system and cooling fans.

Solution

1. Preparation

Gather tools including a multimeter, socket set, and OBD-II scanner.
Disconnect the vehicle's high-voltage battery for safety.
Allow the vehicle to cool down before starting work.

2. Inspect Electrical Components

Sub-steps:
- Remove any plastic covers or shields to access the wiring harness and components.
- Use a multimeter to check the continuity of the wiring harness for shorts or breaks.
- Look for any signs of overheating, such as discoloration or melted insulation on wires.

3. Examine Battery Cooling System

Sub-steps:
- Check the coolant reservoir for proper levels and inspect hoses for leaks or cracks.
- Ensure that the battery cooling fans are operational; test them by applying power directly if necessary.
- Clean any debris that may obstruct the airflow to the battery cooling system.

4. Replace Damaged Components

Sub-steps:
- Replace any burnt or damaged wires or connectors identified during inspection.
- If the battery cooling fans are inoperative, replace them with compatible OEM parts.
- Reassemble any components removed during the inspection.