my Tesla Model S Original (2012-2020) keeps losing power steering, what could be wrong

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

533 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 loss in Tesla Model S (2012-2020). Step-by-step guide with diagnostic procedures 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.
•Allow the vehicle to cool down before working on the steering system.

Symptoms

•Intermittent loss of power steering assistance
•Steering wheel feels heavy or difficult to turn
•Warning messages on the dashboard related to power steering
•Increased steering effort at low speeds
•Possible noise from the steering rack or motor

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any related fault codes.
2
Inspect the power steering fluid level and check for leaks in the system.
3
Check the electrical connections to the power steering motor for corrosion or damage.
4
Test the voltage and ground at the power steering motor using a multimeter.
5
Verify the operation of the power steering control module.
6
Inspect the power steering rack for signs of wear or damage.

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
•Multimeter
•Torque wrench
•Electrical cleaner

Parts Required

•Power steering fluid (as needed)
•Power steering motor (if defective)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any related fault codes.
2
Inspect the power steering fluid level and check for leaks in the system.
3
Check the electrical connections to the power steering motor for corrosion or damage.
4
Test the voltage and ground at the power steering motor using a multimeter.
5
Verify the operation of the power steering control module.
6
Inspect the power steering rack for signs of wear or damage.

Solution

1. Preparation

Gather tools and parts.
Disconnect the vehicle's 12V battery for safety.
Allow the vehicle to rest for a few minutes to ensure any electrical charge dissipates.

2. Inspect Power Steering Fluid

Locate the power steering fluid reservoir.
Remove the cap and check the fluid level; top off with the recommended fluid if low.
Inspect for leaks around hoses and connections.

3. Electrical Connection Check

Reconnect the battery and carefully inspect the wiring harness leading to the power steering motor.
Disconnect the electrical connector and clean any corrosion with electrical cleaner.
Reconnect and ensure a secure fit.

4. Voltage Testing

With the battery connected, use a multimeter to check the voltage at the power steering motor connector.
The voltage should be within the manufacturer’s specifications (typically around 12V).
If voltage is absent or out of spec, trace back to the control module for further inspection.

5. Replace Components if Necessary

If the power steering motor is defective, remove it by:
- Disconnecting the electrical connector.
- Removing mounting bolts using a socket set.
- Gently pulling the motor out of the steering rack.
Install the new motor by reversing the steps and ensuring proper torque on the mounting bolts (check manufacturer’s specifications).

6. Final Assembly

Reconnect all electrical connections securely.
Refill the power steering fluid as needed.
Reconnect the battery and clear any diagnostic codes.