my Tesla Model S Original (2012-2020) has a strong burning smell what does it mean

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

2-4 hours

Time

medium

Difficulty

critical

Severity

3 min read

574 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 strong 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 12V battery before working on electrical components
•Ensure the vehicle is powered down and cool before inspection

Symptoms

•Strong burning smell inside or outside the vehicle
•Possible warning lights on the dashboard
•Smoke or visible signs of burning from components
•Noises such as buzzing or popping sounds
•Decreased performance or power loss
•Increased heat from the battery or motor area

Diagnostic Steps

1
Inspect for visible damage on wiring harnesses, connectors, and electrical components
2
Scan for error codes using an OBD-II scanner
3
Check battery health with Tesla's diagnostic tools or a third-party battery tester
4
Examine the battery cooling system for leaks or blockages
5
Monitor component temperatures with an infrared thermometer
6
Inspect the drive unit for signs of overheating or unusual wear

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
•Infrared thermometer
•Multimeter
•Basic hand tools (screwdrivers, wrenches)

Parts Required

•Replacement wiring and connectors
•New battery pack (if required)
•Replacement cooling hoses or coolant

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Diagnostic Steps

1
Inspect for visible damage on wiring harnesses, connectors, and electrical components
2
Scan for error codes using an OBD-II scanner
3
Check battery health with Tesla's diagnostic tools or a third-party battery tester
4
Examine the battery cooling system for leaks or blockages
5
Monitor component temperatures with an infrared thermometer
6
Inspect the drive unit for signs of overheating or unusual wear

Solution

1. Preparation

Tools Required: OBD-II scanner, infrared thermometer, multimeter, basic hand tools (screwdrivers, wrenches).
Safety Warnings: Disconnect the 12V battery before working on electrical components. Ensure the vehicle is powered down and cool before inspection.

2. Address Electrical Issues

Inspect Wiring Harness:
- Remove any covers to access the wiring harness.
- Look for frayed wires or melted insulation; replace any damaged wires.
Check Connectors:
- Examine all electrical connectors for signs of burning or corrosion.
- Clean connectors with electrical contact cleaner and reassemble securely.

3. Replace Faulty Components

Battery Pack:
- If the battery is damaged, follow the manufacturer's guidelines for safe removal.
- Replace with a new or refurbished battery pack. Ensure compatibility with the Model S.

4. Repair or Replace Cooling System

Inspect Cooling Hoses:
- Check for any leaks or blockages in the cooling hoses.
- Replace damaged hoses and ensure all connections are tight.
Flush Cooling System:
- If coolant is contaminated, drain and replace with OEM coolant.

5. Final Assembly and Testing

Reassemble Components: Ensure all covers and panels are reattached correctly.
Reconnect Battery: Reconnect the 12V battery and power on the vehicle.
Conduct Test Drive: Monitor for any smells or unusual sounds during a short drive.