why does my Tesla Model S Original (2012-2020) have a jerking motion during acceleration

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

521 words

Problem Statement

Learn how to diagnose and fix jerking motion during acceleration 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.
•Ensure the vehicle is securely lifted and supported before working underneath.

Symptoms

•Jerking or stuttering during acceleration
•Reduced acceleration performance
•Noticeable changes in power delivery
•Possible warning messages on the dashboard
•Unusual sounds from the electric motor or drivetrain

Diagnostic Steps

1
Scan the vehicle using an OBD-II scanner to check for error codes related to the drive system.
2
Inspect the battery health using the vehicle's built-in diagnostics.
3
Check the condition of the drive unit and associated electrical connections for any signs of damage or corrosion.
4
Examine the motor mounts for wear or failure that could cause movement during acceleration.
5
Test the throttle response and recalibrate if necessary through the vehicle settings.
6
Monitor the battery temperature and performance during acceleration to identify thermal issues.

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
•Torque wrench
•Multimeter
•Battery cleaning solution

Parts Required

•Motor mounts (if replacement is necessary)
•Electrical connectors (if any are damaged)

Related Faults

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Diagnostic Steps

1
Scan the vehicle using an OBD-II scanner to check for error codes related to the drive system.
2
Inspect the battery health using the vehicle's built-in diagnostics.
3
Check the condition of the drive unit and associated electrical connections for any signs of damage or corrosion.
4
Examine the motor mounts for wear or failure that could cause movement during acceleration.
5
Test the throttle response and recalibrate if necessary through the vehicle settings.
6
Monitor the battery temperature and performance during acceleration to identify thermal issues.

Solution

1. Preparation

Ensure the vehicle is parked on a level surface and the parking brake is engaged.
Disconnect the vehicle's 12V battery to prevent electrical shock.
Gather necessary tools and parts.

2. Inspect Battery Connections

Tools Required: Socket set, torque wrench
Remove the covers protecting the battery terminals.
Check the tightness of battery connections; ensure they are free from corrosion.
Clean any corrosion with a battery cleaning solution and a wire brush.
Reattach the battery terminals securely and torque them to specifications (typically 5-10 Nm).

3. Examine Drive Unit and Electrical Connections

Tools Required: Multimeter, socket set
Inspect the drive unit for any visible damage or leaks.
Use a multimeter to test electrical connections for continuity and proper voltage.
Tighten any loose connections and replace any damaged wiring or connectors as necessary.

4. Replace Motor Mounts (if needed)

Tools Required: Jack and jack stands, socket set
Safely lift the vehicle using jack stands.
Locate the motor mounts; remove the bolts securing them to the chassis and the motor.
Replace with new motor mounts and torque bolts to manufacturer specifications.

5. Reconnect Battery and Test

Reconnect the 12V battery and ensure all connections are secure.
Perform a throttle calibration through the vehicle's settings.
Conduct a test drive to monitor for any further jerking or performance issues.