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

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

600 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 problems 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 negative battery terminal before working on electrical systems.
•Allow the vehicle to cool down before starting repairs to avoid burns or injuries.

Symptoms

•Steering wheel feels heavy or difficult to turn
•Power steering assist intermittent or completely lost
•Warning message displayed on the dashboard
•Unusual noises when turning the steering wheel
•Check for any related error codes using OBD-II

Diagnostic Steps

1
Scan the vehicle’s computer 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) to ensure it is within the recommended range.
3
Check the electrical connections and wiring to the power steering unit for signs of damage or corrosion.
4
Test the power steering motor by monitoring its voltage and current draw during operation.
5
Inspect the steering rack for any signs of physical damage or leaks.
6
Verify the functionality of the steering angle sensor by checking its calibration and response.

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
•Multimeter
•Socket set
•Torque wrench
•Ratchet

Parts Required

•New power steering motor (if faulty)
•Electrical connectors (if damaged)

Related Faults

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Diagnostic Steps

1
Scan the vehicle’s computer 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) to ensure it is within the recommended range.
3
Check the electrical connections and wiring to the power steering unit for signs of damage or corrosion.
4
Test the power steering motor by monitoring its voltage and current draw during operation.
5
Inspect the steering rack for any signs of physical damage or leaks.
6
Verify the functionality of the steering angle sensor by checking its calibration and response.

Solution

1. Preparation

Gather necessary tools and parts.
Park the vehicle on a level surface and engage the parking brake.
Disconnect the negative battery terminal to ensure safety while working on the electrical system.

2. Inspect and Repair Electrical Connections

Tools Required: Socket set, multimeter, wire brush
Remove any protective covers to access the power steering unit.
Use a multimeter to test the voltage at the power steering motor connector; it should match the specifications outlined in the service manual.
Clean any corroded connectors with a wire brush and apply electrical contact cleaner.
Reconnect any loose or damaged wires and ensure all connections are secure.

3. Replace Power Steering Unit (if necessary)

Tools Required: Torque wrench, socket set, ratchet, alignment tools
If the power steering motor is faulty, remove it by following these sub-steps:
- Disconnect the electrical connector to the power steering motor.
- Remove the mounting bolts securing the power steering unit to the vehicle's chassis.
- Carefully detach the power steering unit from the steering rack.
Install the new power steering unit:
- Align the new motor with the mounting points and secure it with bolts, tightening them to the specified torque in the service manual.
- Reconnect the electrical connector.

4. Calibration and Testing

Tools Required: Diagnostic scanner
After installation, perform a calibration of the steering angle sensor using a diagnostic scanner to ensure proper functioning.
Verify that the system is functioning correctly by checking for any error codes and ensuring the power steering assist is restored.