why does my Tesla Model S Original (2012-2020) drive in the wrong gear

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

1-3 hours

Time

medium

Difficulty

high

Severity

3 min read

505 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 transmission issues in Tesla Model S (2012-2020) that cause it to drive in the wrong gear. Step-by-step guide included.

Affected Component

Transmission

Estimated Time

1-3 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems to prevent shock.
•Allow the vehicle to cool before working on the drive unit.

Symptoms

•Unusual acceleration behavior (too slow or too fast)
•Erratic gear shifting (shifts when not expected)
•Regenerative braking not functioning properly
•Increased noise from the drive unit
•Warning messages on the dashboard related to gear selection

Diagnostic Steps

1
Scan the vehicle's systems using a Tesla diagnostic tool to check for error codes related to the transmission or drive unit.
2
Inspect the software version of the vehicle for updates and known issues.
3
Check the battery health and state of charge, as it can affect performance.
4
Review the drive unit settings via the Tesla app or onboard diagnostics.
5
Verify the physical condition of the drive unit and associated wiring for any visible damage or loose connections.

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

•Tesla diagnostic tool
•Laptop with Tesla software
•Multimeter
•Socket set

Parts Required

•Wiring harness (if damaged)
•Drive unit components (if needed)

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Scan the vehicle's systems using a Tesla diagnostic tool to check for error codes related to the transmission or drive unit.
2
Inspect the software version of the vehicle for updates and known issues.
3
Check the battery health and state of charge, as it can affect performance.
4
Review the drive unit settings via the Tesla app or onboard diagnostics.
5
Verify the physical condition of the drive unit and associated wiring for any visible damage or loose connections.

Solution

1. Preparation

Ensure the vehicle is parked on a level surface with the parking brake engaged.
Gather necessary tools such as a laptop with Tesla diagnostic software, a multimeter, and basic hand tools.
Disconnect the vehicle from any charging source.

2. Update Software

Connect the vehicle to a Wi-Fi network.
Navigate to the software update section in the settings menu.
Check for updates and install any available updates to fix known bugs or issues.

3. Inspect Drive Unit Connections

Remove the rear underbody cover using a socket set.
Inspect the wiring harnesses connected to the drive unit for any signs of wear or damage.
Reconnect any loose connectors and secure them properly.

4. Perform a Drive Unit Reset

With the vehicle in "Park," press and hold the brake pedal.
While holding the brake, press and hold the scroll wheel on the steering wheel until the display resets.
Release the brake pedal and allow the vehicle to recalibrate its systems.

5. Test Drive

After performing the above steps, take the vehicle for a test drive.
Monitor the performance and responsiveness, ensuring that the vehicle now shifts and accelerates correctly.