my Tesla Model S Plaid/Refresh (2021-present) emits a burning smell when accelerating

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

546 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 battery before working on electrical systems.
•Allow the vehicle to cool before inspecting the brakes or battery components.

Symptoms

•Burning smell during acceleration
•Possible smoke from the vehicle’s rear or front
•Loss of power during acceleration
•Warning lights on the dashboard (e.g., brake warning light)
•Unusual noises from the drivetrain or brakes

Diagnostic Steps

1
Inspect the brake system for overheating, including brake pads and rotors.
2
Check for any visible signs of electrical issues, such as damaged wiring or burnt connectors.
3
Use the vehicle's diagnostic interface to check for error codes related to the battery, motors, or drivetrain.
4
Inspect the battery pack for signs of damage or overheating.
5
Test the drivetrain components for proper operation and any unusual noises.

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
•Jack and jack stands
•Infrared thermometer

Parts Required

•Brake pads (if worn)
•Wiring harness (if damaged)
•Connectors (if burnt)

Related Faults

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Diagnostic Steps

1
Inspect the brake system for overheating, including brake pads and rotors.
2
Check for any visible signs of electrical issues, such as damaged wiring or burnt connectors.
3
Use the vehicle's diagnostic interface to check for error codes related to the battery, motors, or drivetrain.
4
Inspect the battery pack for signs of damage or overheating.
5
Test the drivetrain components for proper operation and any unusual noises.

Solution

1. Preparation

Tools Required: OBD-II scanner, multimeter, jack and jack stands, infrared thermometer.
Ensure the vehicle is parked on a flat surface and turn off the ignition.
Disconnect the battery for safety while working on electrical components.

2. Brake Inspection

Sub-steps:
1. Raise the vehicle using a jack and secure it with jack stands.
2. Remove the wheel to access the brake assembly.
3. Visually inspect brake pads and rotors for excessive wear or glazing.
4. Measure the temperature of the brakes using an infrared thermometer; temperatures over 300°F (150°C) may indicate overheating.
5. If the pads are worn or damaged, replace them with OEM parts.

3. Electrical System Check

Sub-steps:
1. Inspect all wiring and connectors around the battery and motors for signs of melting or burning.
2. Use a multimeter to check for continuity in the wiring harness.
3. Replace any damaged wiring or connectors to prevent short circuits.

4. Battery Inspection

Sub-steps:
1. Remove the battery cover (if applicable) to inspect the battery pack.
2. Look for any signs of swelling, leakage, or burnt spots on the battery.
3. If any damage is detected, consult a Tesla-certified technician for replacement.

5. Drivetrain Check

Sub-steps:
1. Inspect the motor mounts and drivetrain components for any signs of wear or failure.
2. Listen for unusual noises when the vehicle is in gear and under acceleration.
3. If any components are worn out, replace them as needed, ensuring to use OEM parts.