C0684 - Understanding and Fixing the Traction Control Malfunction in 2013-2019 Ford and GM Models

Quick Answer

C0684 means: DTC C0684 signifies a traction control sensor circuit malfunction.

Fix: Check and replace faulty components Cost: $150 - $300 Time: 90-180 minutes

Can I drive with C0684? Immediate attention is recommended to ensure vehicle safety.

Common Questions

What does C0684 mean and how does it affect my car?

C0684 indicates a problem with the traction control system, which helps prevent wheel spin during acceleration. If this system malfunctions, you may experience loss of traction, especially in slippery conditions, leading to safety concerns.

What are the most common causes of C0684 and how much does it cost to fix?

Common causes include a faulty traction control sensor, damaged wiring, or control module issues. Repair costs typically range from $100 to $300, depending on the specific issue and parts required.

Can I drive my car with C0684 or should I stop immediately?

While you can technically drive with C0684, it is not advisable as it compromises your vehicle's stability. It is best to address the issue promptly to avoid potential accidents.

How can I diagnose C0684 myself using GeekOBD APP?

Connect the GeekOBD app to your vehicle's OBD2 port, scan for codes, and review the freeze frame data for insights. Follow the diagnostic steps to test the traction control sensor and wiring.

What vehicles are most commonly affected by C0684?

C0684 is frequently reported in 2013-2019 Ford F-150, Chevrolet Silverado, and GMC Sierra models. Check for any manufacturer recalls or technical service bulletins related to your vehicle.

How can I prevent C0684 from happening again?

Regular vehicle maintenance, including inspecting the traction control system during service, can prevent issues. Keeping electrical connections clean and free of corrosion is also crucial.

What is C0684?

The diagnostic trouble code DTC C0684 indicates a malfunction in the Traction Control System (TCS) or related components, specifically the traction control sensor circuit. This code is commonly seen in various Ford and General Motors vehicles from 2013 to 2019. When the TCS experiences a malfunction, it can lead to compromised vehicle stability, especially during slippery conditions. The traction control system is designed to prevent wheel spin during acceleration by applying brake force to individual wheels or reducing engine power. If C0684 is triggered, the system may not function correctly, which can increase the risk of skidding or losing control while driving. In practical terms, drivers may notice the traction control warning light illuminated on the dashboard. Ignoring this issue can lead to further complications, including potential damage to the drivetrain or safety systems. To effectively address this code, a thorough diagnostic process is essential, which may involve checking wiring, connectors, and the sensor itself. Regular maintenance and prompt attention to warning lights can help ensure your vehicle's safety and performance.

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

Symptoms

Common symptoms when C0684 is present:

  • The traction control warning light illuminates on the dashboard, indicating a potential issue with the system.
  • Drivers may experience reduced acceleration or engine power, particularly in wet or slippery conditions, leading to a frustrating driving experience.
  • There may be a noticeable increase in tire slippage or loss of traction when accelerating, especially on icy roads.
  • In some cases, the vehicle may enter 'limp mode', where power is restricted to prevent further damage.
  • Unusual noises from the braking system may occur as the TCS attempts to engage, such as grinding or clicking sounds.

Possible Causes

Most common causes of C0684 (ordered by frequency):

  1. Faulty traction control sensor - This is the most common cause, accounting for approximately 60% of C0684 cases. The sensor may fail due to wear and tear or exposure to the elements.
  2. Damaged wiring or connectors - About 25% of cases are attributed to damaged wiring or loose connections within the TCS circuit, often due to corrosion or physical damage.
  3. Control module issues - Roughly 10% of cases can be traced back to a malfunctioning control module that fails to process signals from the traction control sensor correctly. Regular software updates may help prevent this.
  4. Issues with the ABS system - In some vehicles, the ABS and TCS are interconnected; thus, problems within the ABS system can also trigger C0684.
  5. Less commonly, a malfunction in the brake system can affect the TCS operation, leading to this code.

C0684 Repair Costs

Cost Breakdown by Repair Type

Traction Control Sensor Replacement

Replacing the faulty traction control sensor to restore proper function.

  • Total: $150 - $300
  • Success rate: 85%
Wiring Repair

Repairing or replacing damaged wiring or connectors in the TCS circuit.

  • Total: $100 - $200
  • Success rate: 75%
Money-Saving Tips for C0684
  • 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 C0684 Diagnosis Process

Follow these systematic steps to accurately diagnose C0684. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Initial visual inspection - Check for obvious signs like frayed wiring, loose connections, or corrosion around the traction control sensor and circuit (5-10 minutes)

Step 1: Initial visual inspection - Check for obvious signs like frayed wiring, loose connections, or corrosion around the traction control sensor and circuit (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 - Use the GeekOBD app to retrieve all codes and freeze frame data to understand the fault context (10-15 minutes)

Step 2: OBD2 scan with GeekOBD APP - Use the GeekOBD app to retrieve all codes and freeze frame data to understand the fault context (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 - Utilize a multimeter to test the traction control sensor's voltage and resistance, ensuring it meets manufacturer specifications (20-30 minutes)

Step 3: Component testing - Utilize a multimeter to test the traction control sensor's voltage and resistance, ensuring it meets manufacturer specifications (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 repairs, conduct a system function test using the GeekOBD app to verify proper operation and clear codes (10-15 minutes)

Step 4: System function test - After repairs, conduct a system function test using the GeekOBD app to verify proper operation and clear codes (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 varied conditions to confirm repair success and ensure stability systems function correctly (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under varied conditions to confirm repair success and ensure stability systems function correctly (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: Traction Control Sensor Replacement in a 2015 Ford F-150

Vehicle: 2015 Ford F-150, 45,000 miles

Problem: Customer reported the traction control warning light was illuminated.

Diagnosis: After scanning with GeekOBD, code C0684 was confirmed. Visual inspection revealed a faulty traction control sensor.

Solution: Replaced the traction control sensor and rechecked the system using GeekOBD.

Cost: $250 (parts: $150, labor: $100)

Result: The warning light was cleared, and the system functioned correctly after repairs.

Case Study 2: Wiring Repair in a 2018 Chevrolet Silverado

Vehicle: 2018 Chevrolet Silverado, 30,000 miles

Problem: Customer experienced loss of traction and warning light on the dashboard.

Diagnosis: Upon inspection, damaged wiring in the traction control circuit was found.

Solution: Repaired the wiring and secured connections to prevent future issues.

Cost: $150 (parts: $50, labor: $100)

Result: Vehicle stability was restored, and the customer reported no further issues.

Diagnose C0684

Use GeekOBD APP for professional diagnosis!

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

Code: C0684
System: Chassis (ABS, Steering, Suspension)
Severity: HIGH
Category: Chassis Codes