What should I do if my 2013 Volvo XC60 has a steering assist warning light?

Volvo XC60 First Generation (2008-2017)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

Error Code: C0070

4 min read

631 words

Problem Statement

Learn how to diagnose and repair the steering assist warning light issue on your 2013 Volvo XC60 with our detailed guide.

Error Code

C0070

Affected Component

Electric Power Steering (EPS) system

Estimated Time

2-4 hours

Symptoms

•A yellow or red warning light on the dashboard, typically depicting a steering wheel icon.
•Difficulty steering the vehicle, especially at low speeds.
•Increased effort required to turn the steering wheel.
•No noticeable change in steering feel, but the warning light remains illuminated.

Diagnostic Steps

1
Visual Inspection of steering components.
2
Check battery condition.
3
Scan for Diagnostic Trouble Codes (DTCs) using OBD-II scanner.
4
Check power steering fluid level.
5
Inspect the steering angle sensor.
6
Inspect wiring and connectors.

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
•Rags
•Funnel
•Multimeter
•Torque wrench
•Visual inspection tools (flashlight)

Related Faults

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Solution

Step 1: Initial Inspection

Visual Inspection: Check for any visible signs of damage or wear around the steering components, including the steering rack, tie rods, and power steering pump.
Battery Condition: Ensure the vehicle's battery is fully charged. A weak battery can affect electrical systems, including power steering.

Step 2: Scan for Diagnostic Trouble Codes (DTCs)

Tools Required: OBD-II Scanner
Procedure:
1. Connect the OBD-II scanner to the vehicle's OBD-II port (typically located under the dashboard on the driver's side).
2. Turn the ignition key to the "ON" position without starting the engine.
3. Use the scanner to read any stored DTCs related to the steering assist system. Common codes may include C0070 (Steering Angle Sensor) or related codes indicating issues with the EPS (Electric Power Steering) system.

Step 3: Check Power Steering Fluid Level

Tools Required: Rags, funnel (if needed)
Procedure:
1. Open the hood and locate the power steering fluid reservoir (usually near the front of the engine bay).
2. Check the fluid level against the markings on the reservoir. If it’s low, top it off with the correct type of power steering fluid as specified in the owner's manual.

Step 4: Inspect the Steering Angle Sensor

Tools Required: Multimeter, torque wrench
Procedure:
1. Locate the steering angle sensor (usually near the steering column).
2. Disconnect the sensor and use a multimeter to test its resistance according to the specifications.
3. Reconnect the sensor and ensure it is properly mounted and secured.

Step 5: Inspect Wiring and Connectors

Tools Required: Visual inspection tools (flashlight), multimeter
Procedure:
1. Inspect wiring harnesses leading to the power steering system for any fraying, corrosion, or disconnections.
2. Check connectors for tightness and cleanliness. Use a multimeter to test for continuity and proper voltage at the connectors.

Repair Instructions

Repairing or Replacing Power Steering Components

If diagnostics indicate a faulty component (e.g., EPS module or power steering pump):

Disconnect Battery: Disconnect the negative battery terminal to prevent any electrical shorts.
Remove Steering Column Covers: Use a Phillips screwdriver to remove screws securing the steering column covers and gently pull them apart.
Replace Faulty Component:
- EPS Module: Remove bolts securing the EPS module. Disconnect the electrical connectors. Install the new module, secure with bolts, and reconnect the electrical connectors.
- Power Steering Pump: Drain the power steering fluid. Disconnect hoses from the pump, remove mounting bolts using a socket set, and replace with a new pump. Reconnect hoses and refill the system with new fluid.
Reassemble: Reinstall any removed covers or components.
Reconnect Battery: Reconnect the negative battery terminal.
Clear DTCs: Use the OBD-II scanner to clear any stored codes.
Test Drive: Start the vehicle and take it for a test drive to ensure the steering assist warning light is off and the steering operates normally.

Final Checks

After repairs, always perform a full inspection of the steering system and road test the vehicle to confirm that the steering assist warning light remains off and that steering response is normal.

Conclusion

In case the warning light persists after following these steps, it is advisable to consult with a professional automotive technician or visit a Volvo service center for further diagnostics and repairs.