why does my Tesla Model S Original (2012-2020) have a burning smell

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

542 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 burning smell issues 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 systems to prevent shock.
•Allow the vehicle to cool down before inspecting any components that may have been exposed to high temperatures.

Symptoms

•Burning smell inside or outside the vehicle
•Warning lights illuminated on the dashboard
•Electrical malfunctions (e.g., malfunctioning lights or displays)
•Reduced power or performance issues
•Increased temperature reading on the vehicle's display

Diagnostic Steps

1
Inspect the vehicle's cabin and undercarriage for signs of burnt wiring or components.
2
Use the Tesla diagnostic tool to check for error codes related to electrical systems or battery management.
3
Examine the battery pack and associated connections for any signs of overheating or damage.
4
Check for any visible smoke or charred components in the engine bay or undercarriage.
5
Assess the condition of the drive unit for any burnt oil or unusual sounds indicating failure.

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
•Flashlight
•Safety goggles
•Gloves

Parts Required

•Replacement wiring harnesses
•Connectors or terminals (if damaged)

Related Faults

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Diagnostic Steps

1
Inspect the vehicle's cabin and undercarriage for signs of burnt wiring or components.
2
Use the Tesla diagnostic tool to check for error codes related to electrical systems or battery management.
3
Examine the battery pack and associated connections for any signs of overheating or damage.
4
Check for any visible smoke or charred components in the engine bay or undercarriage.
5
Assess the condition of the drive unit for any burnt oil or unusual sounds indicating failure.

Solution

1. Preparation

Tools Required: OBD-II scanner, multimeter, socket set, flashlight, safety goggles, gloves.
Ensure the vehicle is parked on a flat surface and turn it off completely.
Disconnect the 12V battery to prevent any electrical shock or short circuit.

2. Visual Inspection

Sub-steps:
1. Inspect the wiring harnesses under the dashboard and in the engine compartment for any signs of wear, fraying, or burnt insulation.
2. Check connectors and terminals for corrosion or heat damage.
3. Look for melted plastic or burnt components around the battery pack and electronics.

3. Electrical System Test

Sub-steps:
1. Reconnect the 12V battery.
2. Use a multimeter to check the voltage across battery terminals; a reading outside normal range (around 12.6V) may indicate an issue.
3. Scan the vehicle with the OBD-II scanner for any error codes that might indicate electrical faults.

4. Component Replacement

Sub-steps:
1. Identify any damaged wires or components that need replacement based on the visual inspection and diagnostic codes.
2. Disconnect the battery again before replacing any electrical components.
3. Replace damaged wiring harnesses or connectors, ensuring proper gauge and insulation.
4. Reconnect all components securely and ensure there are no loose connections.

5. Final Assembly

Sub-steps:
1. Reassemble any panels or coverings that were removed during inspection.
2. Reconnect the 12V battery and ensure all systems are operational.
3. Perform a functionality check to ensure no further issues are present.