what to do if my Tesla Model S Plaid/Refresh (2021-present) has a persistent engine noise

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

513 words

Problem Statement

Learn how to diagnose and fix persistent engine noise in Tesla Model S Plaid (2021-present). Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Engine

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the 12V battery before working on electrical components.
•Allow the vehicle to cool down before inspecting the engine compartment.

Symptoms

•Unusual humming or whining noise from the engine compartment
•Noise present during acceleration and deceleration
•Intermittent rattling sounds when idling
•Decreased performance or responsiveness
•Possible vibration felt through the chassis

Diagnostic Steps

1
Use an OBD-II scanner to check for any fault codes that may indicate issues with the electric motors or related systems.
2
Examine the engine compartment visually for loose components, damaged parts, or foreign objects that might be causing noise.
3
Inspect motor mounts and any fasteners for wear or looseness that could contribute to noise.
4
Use a stethoscope or a mechanic's listening device to identify the exact source of the noise.
5
Conduct a test drive under various conditions (acceleration, deceleration, turns) to replicate the noise and evaluate its consistency.

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
•Socket set
•Mechanic's stethoscope
•Torque wrench
•Safety gloves
•Eye protection

Parts Required

•Motor mounts
•Replacement bearings (if applicable)

Related Faults

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Diagnostic Steps

1
Use an OBD-II scanner to check for any fault codes that may indicate issues with the electric motors or related systems.
2
Examine the engine compartment visually for loose components, damaged parts, or foreign objects that might be causing noise.
3
Inspect motor mounts and any fasteners for wear or looseness that could contribute to noise.
4
Use a stethoscope or a mechanic's listening device to identify the exact source of the noise.
5
Conduct a test drive under various conditions (acceleration, deceleration, turns) to replicate the noise and evaluate its consistency.

Solution

1. Preparation

Tools Required: OBD-II scanner, socket set, mechanic's stethoscope, torque wrench, safety gloves, and eye protection.
Safety Warnings: Disconnect the 12V battery before working on electrical components to prevent shock.

2. Address Loose Components

Inspect and Tighten: Check all visible bolts, screws, and brackets in the engine compartment. Use a torque wrench to tighten any loose fasteners to manufacturer specifications.
Reassemble: If any components were removed for inspection, ensure they are properly reassembled.

3. Replace Worn Components

Identify Worn Parts: Based on the visual inspection or test drive findings, identify any components (like motor mounts or bearings) that need replacement.
Remove and Replace:
- For motor mounts:
  1. Raise the vehicle and securely support it with jack stands.
  2. Remove the bolts securing the motor mount to the subframe and motor.
  3. Replace with new motor mounts and torque the bolts to the manufacturer's specifications.
- For bearings:
  1. Remove the affected assembly (e.g., wheel or motor assembly).
  2. Replace the bearings and reassemble while ensuring proper lubrication.

4. Final Assembly and Checks

Reassemble Any Removed Components: Ensure everything is put back together securely.
Reconnect Battery: Reconnect the 12V battery and double-check all connections.