how to fix Tesla Model S Original (2012-2020) with power steering issues

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

4 min read

650 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 power steering issues in Tesla Model S (2012-2020). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Steering

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Ensure the vehicle is securely supported on jack stands before working underneath.

Symptoms

•Steering wheel feels heavy or unresponsive
•Difficulty in making turns, especially at low speeds
•Steering assist warning message displayed on the dashboard
•Unusual noises from the steering system (whining or grinding)
•Sudden loss of power steering assist while driving

Diagnostic Steps

1
Scan the vehicle using an OBD-II scanner to check for any error codes related to the power steering system.
2
Inspect the power steering fluid level and condition if applicable (check for leaks or contamination).
3
Check the electrical connections to the power steering motor for damage or loose connections.
4
Test the steering gear and assist motor for proper function using a multimeter.
5
Verify the operation of the steering angle sensor to ensure it is sending correct signals to the power steering control module.
6
Inspect the steering rack and related components for any physical damage or wear.

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
•Jack and jack stands

Parts Required

•Power steering motor (if replacement is necessary)
•Power steering fluid (if applicable)

Related Faults

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Diagnostic Steps

1
Scan the vehicle using an OBD-II scanner to check for any error codes related to the power steering system.
2
Inspect the power steering fluid level and condition if applicable (check for leaks or contamination).
3
Check the electrical connections to the power steering motor for damage or loose connections.
4
Test the steering gear and assist motor for proper function using a multimeter.
5
Verify the operation of the steering angle sensor to ensure it is sending correct signals to the power steering control module.
6
Inspect the steering rack and related components for any physical damage or wear.

Solution

1. Preparation

Gather tools and parts required for the repair.
Ensure the vehicle is parked on a flat surface and the ignition is off.
Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace Power Steering Motor

Remove the Front Wheel
- Use a jack to lift the front of the vehicle and secure it with jack stands.
- Remove the lug nuts using a socket set and take off the front wheel.
Access the Power Steering Motor
- Locate the power steering motor, typically situated near the steering rack.
- Remove any covers or shields obstructing access to the motor.
Disconnect Electrical Connectors
- Carefully disconnect any wiring harnesses connected to the power steering motor.
- Use a multimeter to check for voltage at the connector to ensure the system is receiving power.
Remove the Power Steering Motor
- Unscrew the bolts securing the power steering motor to the assembly using the appropriate socket.
- Remove the motor and inspect for any visible damage or wear.
Install New Power Steering Motor
- Position the new power steering motor and secure it with the bolts, tightening to the manufacturer’s torque specifications.
- Reconnect the electrical connectors ensuring a snug fit.

3. Refill Power Steering Fluid (if applicable)

If the system uses fluid, refill it with the manufacturer-recommended fluid type.
Bleed the system as per the manufacturer's guidelines to remove any air pockets.

4. Reassemble and Test

Reinstall Front Wheel
- Place the front wheel back onto the hub and hand-tighten the lug nuts.
- Lower the vehicle and torque the lug nuts to the manufacturer's specifications.
Reconnect Battery and Test Drive
- Reconnect the negative battery terminal.
- Start the vehicle and test the steering functionality by turning the steering wheel from lock to lock.