C0C84 - Understanding the Diagnostic Trouble Code for 2015-2020 Ford F-150 and Other Models

Quick Answer

C0C84 means: C0C84 indicates a communication issue in the steering control module.

Fix: Check and replace faulty components Cost: $500 - $800 Time: 90-180 minutes

Can I drive with C0C84? Immediate inspection is recommended to avoid potential steering failures.

Common Questions

What does C0C84 mean and how does it affect my car?

C0C84 indicates a communication issue in the steering control module, which can lead to heavy steering, loss of power steering assist, or potentially dangerous driving conditions. It’s crucial to address this code promptly to ensure safe vehicle operation.

What are the most common causes of C0C84 and how much does it cost to fix?

Common causes of C0C84 include a malfunctioning steering control module, wiring issues, and low power steering fluid. Repair costs can range from $100 for wiring repairs to $800 for module replacement, depending on the specific issue.

Can I drive my car with C0C84 or should I stop immediately?

It’s advisable to stop driving your vehicle if the C0C84 code appears, as it can greatly affect steering control and safety. Ignoring the issue may lead to further damage or accidents.

How can I diagnose C0C84 myself using GeekOBD APP?

Using the GeekOBD APP, you can scan for codes and view freeze-frame data. This will help you understand the context of the C0C84 code and any additional codes that may be present, guiding your next steps.

What vehicles are most commonly affected by C0C84?

C0C84 is frequently reported in 2015-2020 Ford F-150 models. Other vehicles equipped with similar steering systems may also experience this code, especially if they have known electrical issues.

How can I prevent C0C84 from happening again?

Regular vehicle maintenance, including checking electrical connections and ensuring fluid levels are adequate, can help prevent C0C84 from occurring. Additionally, keeping software up-to-date can mitigate potential electronic issues.

What is C0C84?

The diagnostic trouble code C0C84 refers to a communication issue within the vehicle's network, particularly affecting the steering control system. This code indicates that the steering control module has detected an issue with the data being transmitted or received from other electronic control units (ECUs) in the vehicle. When this code is triggered, it can have serious implications for your vehicle's handling and safety. Drivers may notice that their steering feels unresponsive or that the vehicle is not tracking straight, which can be alarming. Additionally, the check engine light may illuminate, and features such as power steering assist may be compromised. This code is commonly found in 2015-2020 Ford F-150 models but can also appear in a variety of other vehicles equipped with similar steering systems. Ignoring this code can lead to further electrical issues, increased repair costs, and potential safety hazards on the road. Therefore, it is essential to diagnose and address the underlying issues promptly. Vehicle owners should consider seeking professional help or using advanced diagnostic tools like the GeekOBD APP to pinpoint the issue accurately.

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

Symptoms

Common symptoms when C0C84 is present:

  • Check engine light illuminates and stays on, indicating a fault in the steering control system.
  • Steering feels heavy or unresponsive, especially during low-speed maneuvers, making it difficult to turn the wheel.
  • Potential loss of power steering assist, which can lead to increased effort required for steering, especially during parking.
  • Intermittent warnings or alerts on the dashboard, signaling problems with steering assistance.
  • Unusual noises coming from the steering column during operation, such as grinding or clicking sounds.

Possible Causes

Most common causes of C0C84 (ordered by frequency):

  1. The most common cause is a malfunctioning steering control module, which accounts for approximately 60% of cases. This can be due to internal failures or software glitches.
  2. A second likely cause is a wiring issue, such as corroded connectors or damaged wiring harnesses, which can disrupt communication between modules.
  3. Another cause could be low power steering fluid or air in the system, leading to erratic steering behavior. Regular maintenance can help prevent this.
  4. Less common, but serious, is a failing battery or charging system, which can affect the operation of all electronic components in the vehicle.
  5. A rare cause might be a software issue that requires a firmware update from the manufacturer to restore proper communication between modules.

C0C84 Repair Costs

Cost Breakdown by Repair Type

Steering Control Module Replacement

Replacing the faulty steering control module with a new OEM part.

  • Total: $500 - $800
  • Success rate: 90%
Wiring Repair

Repairing or replacing damaged wiring, connectors, or harnesses associated with the steering control system.

  • Total: $100 - $300
  • Success rate: 75%
Software Update

Updating the steering control module software if a software issue is detected.

  • Total: $50 - $150
  • Success rate: 80%
Money-Saving Tips for C0C84
  • 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 C0C84 Diagnosis Process

Follow these systematic steps to accurately diagnose C0C84. 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 (5-10 minutes)

Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion (5-10 minutes). Look under the hood and around the steering column.

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 (10-15 minutes)

Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context (10-15 minutes). This will help identify if C0C84 is the only code or if there are related issues.

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 or specific diagnostic tools to test the steering control module and related wiring (20-30 minutes)

Step 3: Component testing - Use a multimeter or specific diagnostic tools to test the steering control module and related wiring (20-30 minutes). Ensure the module is receiving power and ground signals.

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 - Verify proper operation after repairs and clear codes to reset the system (10-15 minutes)

Step 4: System function test - Verify proper operation after repairs and clear codes to reset the system (10-15 minutes). Check for any reoccurrence of the C0C84 code.

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 repair success and ensure the steering operates smoothly (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and ensure the steering operates smoothly (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: Steering Control Module Replacement for 2017 Ford F-150

Vehicle: 2017 Ford F-150, 50,000 miles

Problem: Customer reported heavy steering and check engine light illuminated.

Diagnosis: Diagnostic scan revealed C0C84 along with other steering-related codes. Inspection showed a failing steering control module.

Solution: Replaced the steering control module and updated the software. Cleared codes and verified proper operation.

Cost: $750 (parts $600, labor $150)

Result: Customer reported smooth steering and no reoccurrence of the C0C84 code.

Case Study 2: Wiring Repair for 2018 Ford Escape

Vehicle: 2018 Ford Escape, 40,000 miles

Problem: Customer experienced intermittent steering issues and C0C84 code.

Diagnosis: Visual inspection revealed corroded connectors and damaged wiring harness.

Solution: Repaired wiring connections and replaced damaged sections of the harness.

Cost: $250 (parts $50, labor $200)

Result: Steering function restored and no further codes were present after repair.

Diagnose C0C84

Use GeekOBD APP for professional diagnosis!

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  • Step-by-step repair guidance
  • Professional-grade analysis
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Code Information

Code: C0C84
System: Chassis (ABS, Steering, Suspension)
Severity: HIGH
Category: Chassis Codes