why does my Tesla Model S Plaid/Refresh (2021-present) have a burning smell when I accelerate

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

496 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 the burning smell during acceleration in Tesla Model S Plaid. 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 vehicle from any charging source.
•Ensure the vehicle is in 'Park' mode.
•Disconnect the battery before working on any electrical components.
•Allow the vehicle to cool down before inspecting the brakes or battery system.

Symptoms

•Burning smell during acceleration
•Possible loss of power or reduced performance
•Unusual noises from the drivetrain
•Overheating warning message on the dashboard
•Occasional electrical system alerts

Diagnostic Steps

1
Inspect for any visible signs of burnt wiring or components in the engine bay and undercarriage.
2
Use a diagnostic scanner to check for any error codes related to the battery or motor systems.
3
Monitor the temperature of the electric motors and battery pack using the vehicle's built-in diagnostics.
4
Check the state of the battery coolant and ensure it's at proper levels.
5
Inspect the brake system for any sticking calipers or worn pads that could contribute to overheating.

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
•Temperature gauge
•Basic hand tools

Parts Required

•Tesla-approved battery coolant
•Brake pads (if worn)
•Wiring harness (if damaged)

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Diagnostic Steps

1
Inspect for any visible signs of burnt wiring or components in the engine bay and undercarriage.
2
Use a diagnostic scanner to check for any error codes related to the battery or motor systems.
3
Monitor the temperature of the electric motors and battery pack using the vehicle's built-in diagnostics.
4
Check the state of the battery coolant and ensure it's at proper levels.
5
Inspect the brake system for any sticking calipers or worn pads that could contribute to overheating.

Solution

1. Preparation

Tools Required: OBD-II scanner, multimeter, temperature gauge, basic hand tools.
Safety Warnings: Disconnect the vehicle from any charging source. Ensure the vehicle is in "Park" mode.

2. Inspect Wiring and Components

Visually examine all wiring harnesses around the battery pack and electric motors for signs of damage or melting.
Use a multimeter to check for continuity in wires that may have shorted out.

3. Check Battery Coolant

Locate the coolant reservoir for the battery pack.
Inspect the coolant level; if low, use the recommended Tesla coolant to refill.
Check for leaks in the coolant system that may cause overheating.

4. Brake System Inspection

Remove the wheel to access the brake components.
Inspect the brake pads and rotors for excessive wear or damage.
Ensure calipers are functioning correctly and not seizing.

5. Test Drive and Monitor

After completing repairs, conduct a short test drive.
Monitor for any abnormal smells, noises, or warning lights during acceleration.