C04F4 - Understanding the Power Steering Control Module Trouble Code in 2013-2019 Ford Fusions and Other Models

Quick Answer

C04F4 means: C04F4 indicates a malfunction in the power steering control module, affecting steering assistance.

Fix: Check and replace faulty components Cost: $400 - $800 Time: 90-180 minutes

Can I drive with C04F4? Address immediately to ensure safe vehicle operation.

Common Questions

What does C04F4 mean and how does it affect my car?

The C04F4 code indicates a malfunction in the power steering control module, which can lead to stiff steering and make your vehicle harder to control. If ignored, it may lead to more serious steering issues.

What are the most common causes of C04F4 and how much does it cost to fix?

The most common cause of C04F4 is a faulty power steering control module, which can cost between $400 to $800 to replace. Other causes include damaged wiring or a failing power steering pump.

Can I drive my car with C04F4 or should I stop immediately?

While it may be possible to drive with a C04F4 code, it is not advisable. The steering may become difficult, increasing the risk of accidents. It's best to address it as soon as possible.

How can I diagnose C04F4 myself using GeekOBD APP?

To diagnose C04F4, use the GeekOBD APP to scan your vehicle’s OBD2 system. Look for the C04F4 code and any additional codes that might provide context. Check freeze frame data to understand conditions when the code was triggered.

What vehicles are most commonly affected by C04F4?

The C04F4 code is commonly found in 2013-2019 Ford Fusion models and may also affect other Ford vehicles equipped with electronic power steering systems.

How can I prevent C04F4 from happening again?

To prevent C04F4 from reoccurring, ensure regular maintenance of your vehicle's power steering system, including checking fluid levels and inspecting wiring and connections for wear and tear.

What is C04F4?

The diagnostic trouble code (DTC) C04F4 pertains to the power steering control module, typically found in vehicles like the 2013-2019 Ford Fusion, among others. This code indicates an issue with the electronic power steering (EPS) system, specifically related to the steering gear or the steering control module. The EPS system relies on sensors and electronic components to assist with steering, making it easier for the driver to maneuver the vehicle, especially at lower speeds. When the C04F4 code is triggered, it usually means that the power steering assist is not functioning correctly, which can lead to significant difficulties in steering. Drivers may experience stiff steering, a loss of assistance, or even a complete failure of the power steering system. This can create safety risks, particularly in urban driving conditions where frequent turning is required. It's crucial to address this code promptly to ensure safe vehicle operation and prevent further damage to the power steering system. Ignoring this code can lead to costly repairs down the line, as continued driving without proper power steering can strain other components of the steering system.

System: C - Chassis (ABS, Steering, Suspension)

Symptoms

Common symptoms when C04F4 is present:

  • Check engine light remains illuminated, indicating a potential issue with the power steering system.
  • Stiff steering or difficulty turning the wheel, especially at low speeds, making driving more challenging.
  • Unusual noises during steering maneuvers, such as whining or grinding, which can indicate a failing power steering component.
  • Intermittent loss of power steering assist, where the steering feels normal one moment and becomes difficult the next.
  • Increased vehicle maneuverability difficulties, especially in tight spots or parking situations.

Possible Causes

Most common causes of C04F4 (ordered by frequency):

  1. The most common cause of C04F4 is a faulty power steering control module, with a likelihood of around 60%. If this module fails, it can disrupt the assistive power steering functions.
  2. Another possible cause is damaged wiring or corroded connectors in the power steering system, which can lead to intermittent connectivity issues. This accounts for about 25% of cases.
  3. A third cause could be a failing power steering pump, which can lead to inadequate fluid pressure and assist functionality. Regular checks and maintenance can often prevent this issue.
  4. Less common but serious causes include a complete steering gear failure, which may necessitate complete replacement of the steering mechanism.
  5. Rarely, software issues in the vehicle's computer system can lead to incorrect readings and trigger the C04F4 code, necessitating a software update or reprogramming.

C04F4 Repair Costs

Cost Breakdown by Repair Type

Power Steering Control Module Replacement

Replacing the faulty power steering control module to restore functionality.

  • Total: $400 - $800
  • Success rate: 85%
Wiring Harness Repair

Repairing or replacing damaged wiring and connectors to ensure proper electrical flow.

  • Total: $150 - $300
  • Success rate: 75%
Power Steering Pump Replacement

Replacing a malfunctioning power steering pump if deemed necessary.

  • Total: $300 - $600
  • Success rate: 80%
Money-Saving Tips for C04F4
  • Start with the most common and least expensive repairs first
  • Use GeekOBD APP to confirm diagnosis before replacing expensive parts
  • Consider preventive maintenance to avoid future occurrences
  • Compare prices for OEM vs aftermarket parts based on your needs
  • Address the issue promptly to prevent more expensive secondary damage

Diagnostic Steps

Professional C04F4 Diagnosis Process

Follow these systematic steps to accurately diagnose C04F4. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion in the power steering harness (5-10 minutes)

Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion in the power steering harness (5-10 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 2: Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context and confirm the presence of C04F4 (10-15 minutes)

Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context and confirm the presence of C04F4 (10-15 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 3: Step 3: Component testing - Use a multimeter to test the power steering control module and associated sensors for proper voltage and operation (20-30 minutes)

Step 3: Component testing - Use a multimeter to test the power steering control module and associated sensors for proper voltage and operation (20-30 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 4: Step 4: System function test - After any repairs, verify the proper operation of the power steering system and clear codes using the GeekOBD APP (10-15 minutes)

Step 4: System function test - After any repairs, verify the proper operation of the power steering system and clear codes using the GeekOBD APP (10-15 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 5: Step 5: Road test verification - Drive the vehicle under various conditions to confirm that the power steering assist is functioning correctly and that the C04F4 code does not return (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to confirm that the power steering assist is functioning correctly and that the C04F4 code does not return (15-20 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.

Important Notes

  • Always verify the repair with GeekOBD APP after completing diagnostic steps
  • Clear codes and test drive to ensure the problem is resolved
  • Address underlying causes to prevent code recurrence

Real Repair Case Studies

Case Study 1: Power Steering Control Module Replacement in a 2015 Ford Fusion

Vehicle: 2015 Ford Fusion, 75,000 miles

Problem: The customer reported difficulty steering, especially at low speeds, with the check engine light illuminated.

Diagnosis: Diagnostics revealed the C04F4 code. Testing indicated a malfunctioning power steering control module.

Solution: Replaced the power steering control module and cleared the codes.

Cost: $500 (including parts and labor)

Result: Steering functionality was restored, and the customer reported no further issues.

Case Study 2: Wiring Repair for C04F4 in a 2018 Ford Escape

Vehicle: 2018 Ford Escape, 50,000 miles

Problem: Customer experienced intermittent power steering assist and check engine light activation.

Diagnosis: Upon inspection, damaged wiring leading to the power steering module was identified.

Solution: Repaired the wiring harness and secured all connections.

Cost: $200 (labor and parts included)

Result: The steering assist function was restored, and the C04F4 code did not reappear.

Diagnose C04F4

Use GeekOBD APP for professional diagnosis!

  • Real-time data monitoring
  • Advanced diagnostic features
  • Step-by-step repair guidance
  • Professional-grade analysis
Download GeekOBD APP Get MOBD Adapter

Code Information

Code: C04F4
System: Chassis (ABS, Steering, Suspension)
Severity: HIGH
Category: Chassis Codes