why does my Volkswagen Golf MK7 (2015-2019) lose steering assist while driving?

Volkswagen Golf MK8.5 (2024-Present)

Error Codes

2-4 hours

Time

medium

Difficulty

critical

Severity

3 min read

577 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 loss of steering assist in Volkswagen Golf MK7 (2015-2019). 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 battery before working on electrical systems.
•Allow engine to cool before opening any components related to power steering.

Symptoms

•Steering feels heavy or unresponsive
•Warning lights illuminated on the dashboard (e.g., EPS light)
•Difficulty in making turns, especially at low speeds
•Noise coming from the steering column or pump
•Intermittent loss of power steering assist

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any faults related to the power steering system.
2
Inspect power steering fluid levels and condition; top up or replace if necessary.
3
Check for any leaks or damage in the power steering lines and components.
4
Test the power steering pump for proper operation and pressure output.
5
Inspect the steering column and electric steering rack for any loose connections or faults.
6
Verify battery voltage and charging system, as low voltage can affect electric power steering.

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
•Fluid pump
•Socket set
•Torque wrench
•Multimeter
•Screwdriver set

Parts Required

•Power steering fluid
•Power steering pump (if needed)
•Power steering belt (if worn)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any faults related to the power steering system.
2
Inspect power steering fluid levels and condition; top up or replace if necessary.
3
Check for any leaks or damage in the power steering lines and components.
4
Test the power steering pump for proper operation and pressure output.
5
Inspect the steering column and electric steering rack for any loose connections or faults.
6
Verify battery voltage and charging system, as low voltage can affect electric power steering.

Solution

1. Preparation

Gather tools and parts required for the repair.
Disconnect the negative battery terminal to ensure safety while working on the electrical components.

2. Check and Replace Power Steering Fluid

Tools Required: Fluid pump, funnel, clean rags
Inspect the power steering fluid reservoir; if low or contaminated, drain the old fluid using a fluid pump.
Refill the reservoir with the manufacturer-recommended power steering fluid (consult owner's manual for specifications).
Start the engine and turn the steering wheel from lock to lock to bleed air from the system.

3. Inspect and Repair Power Steering Pump

Tools Required: Socket set, torque wrench
Remove the power steering pump belt by releasing tension using a wrench on the tensioner pulley.
Unbolt the power steering pump from its mounting bracket and disconnect the hydraulic lines.
Replace the pump if it is found to be faulty (no pressure output or excessive noise).
Reinstall the new pump and secure it with the appropriate torque specifications.

4. Inspect Electrical Connections

Tools Required: Multimeter, screwdriver set
Reconnect the battery and use a multimeter to check for voltage at the power steering motor and control unit.
If voltage is present but assist is still lost, inspect the wiring harness for damage or corrosion and repair as needed.
Ensure all connectors are securely attached.

5. Reassemble and Test

Reinstall any components removed during the repair.
Tighten all bolts to the specified torque values and recheck fluid levels.
Reconnect the negative battery terminal and perform a test drive to ensure that steering assist is functioning properly.