why is there a burning smell when I accelerate in my Tesla Model S Plaid/Refresh (2021-present)?

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

518 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 12V battery before working on high-voltage components to avoid electric shock.
•Allow the vehicle to cool down before inspecting the electric motor or battery to prevent burns.

Symptoms

•Burning odor noticeable during acceleration
•Reduced acceleration performance
•Possible overheating warning on the dashboard
•Unusual sounds from the electric motor or battery
•Smoke or visible signs of burning from under the hood or rear

Diagnostic Steps

1
Inspect the battery and electric motor for visible damage or signs of overheating.
2
Use the vehicle's onboard diagnostics to check for any error codes related to the battery or motor.
3
Check the condition of the high-voltage wiring and connectors for signs of wear or damage.
4
Monitor the temperature of the battery pack during acceleration using the Tesla app or onboard display.
5
Inspect the brake system for any signs of overheating or excessive wear, which could contribute to a burning smell.

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

•Multimeter
•Socket set
•Torque wrench
•Inspection mirror
•Brake pad gauge

Parts Required

•High-voltage wiring (if damaged)
•Brake pads (if worn)

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Diagnostic Steps

1
Inspect the battery and electric motor for visible damage or signs of overheating.
2
Use the vehicle's onboard diagnostics to check for any error codes related to the battery or motor.
3
Check the condition of the high-voltage wiring and connectors for signs of wear or damage.
4
Monitor the temperature of the battery pack during acceleration using the Tesla app or onboard display.
5
Inspect the brake system for any signs of overheating or excessive wear, which could contribute to a burning smell.

Solution

1. Preparation

Gather tools and materials needed for inspection.
Ensure the vehicle is parked on a flat surface, and engage the parking brake.
Disconnect the 12V battery for safety before working on high-voltage components.

2. Inspect the Battery and Electric Motor

Remove any covers or panels that obstruct access to the battery and motor.
Visually inspect the battery for any signs of swelling, damage, or burnt connectors.
Check the electric motor for signs of overheating or damage.
Use a multimeter to check for any abnormal voltage readings from the battery terminals.

3. Check High-Voltage Wiring

Inspect all high-voltage wiring for fraying, melting, or damage.
Ensure all connections are secure and free of corrosion.
Replace any damaged wiring or connectors immediately.

4. Brake System Inspection

Inspect brake pads and rotors for wear. If pads are worn, replace them.
Check brake fluid levels and condition; replace if contaminated.
Ensure brake calipers are functioning correctly and free of sticking.

5. Reassemble and Test

Reinstall any covers and panels removed during inspection.
Reconnect the 12V battery.
Perform a test drive to confirm that the burning smell is eliminated and observe for any abnormal performance.