C086C - Understanding the 2015-2020 Chevrolet Silverado and GMC Sierra Code

Quick Answer

C086C means: C086C indicates a fault in the electronic stability control system's communication.

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

Can I drive with C086C? Immediate attention is advised to ensure driving safety.

Common Questions

What does C086C mean and how does it affect my car?

The C086C code indicates a problem with the electronic stability control system, which is crucial for maintaining vehicle traction and stability. If this code appears, you may notice that your car doesn't respond well under slippery conditions, increasing the risk of skidding or losing control.

What are the most common causes of C086C and how much does it cost to fix?

Common causes include faulty wiring, a malfunctioning stability control module, and wheel speed sensor issues. Repair costs can range from $150 for wiring repairs to $800 for module replacements, depending on the severity of the problem.

Can I drive my car with C086C or should I stop immediately?

It's advisable to stop driving your vehicle if you see the C086C code. Ignoring it could lead to dangerous situations, especially in adverse weather where stability control is critical.

How can I diagnose C086C myself using GeekOBD APP?

Using the GeekOBD APP, you can perform a full OBD2 scan to retrieve the C086C code and view related freeze frame data. This helps you understand when and how the fault occurred, facilitating effective troubleshooting.

What vehicles are most commonly affected by C086C?

Common makes and models affected include the 2015-2020 Chevrolet Silverado and GMC Sierra. Be aware that recalls and technical service bulletins (TSBs) may exist for these vehicles, so checking with a dealership can provide additional insights.

How can I prevent C086C from happening again?

To prevent future occurrences of C086C, ensure regular maintenance checks of the stability control system, including inspecting wiring and connections for wear. Additionally, updating vehicle software can help address potential glitches.

What is C086C?

The diagnostic trouble code (DTC) C086C refers to a specific issue within the electronic stability control system, particularly in the Chevrolet Silverado and GMC Sierra models manufactured between 2015 and 2020. This code indicates that the vehicle's stability control module has detected a fault in the communication between the stability control system and other modules in the vehicle. This might be due to various factors, including faulty wiring, a malfunctioning stability control module, or issues with related sensors such as wheel speed sensors. Real-world implications of this code can lead to compromised vehicle stability, particularly under challenging driving conditions. Drivers may experience a lack of traction control, which could increase the risk of skidding or loss of control when driving on slippery surfaces. Additionally, other warning lights may illuminate on the dashboard, including the check engine light or traction control light, indicating that immediate attention is needed. Understanding this code and its impacts is crucial for ensuring vehicle safety and performance, particularly for those who frequently drive in adverse weather conditions or rough terrains.

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

Symptoms

Common symptoms when C086C is present:

  • Check engine light stays on constantly, indicating a fault that needs immediate attention.
  • Traction control light may illuminate, signaling issues with vehicle stability in slippery conditions.
  • Unusual handling or skidding while driving, particularly on wet or icy roads, highlighting compromised stability.
  • Increased stopping distance and reduced control during emergency maneuvers, critical for driver safety.
  • Unresponsive brakes or abnormal ABS operation, which can lead to severe safety risks.

Possible Causes

Most common causes of C086C (ordered by frequency):

  1. Faulty wiring or connectors within the stability control system (approx. 40% likelihood) - This is often due to wear and tear or corrosion.
  2. Malfunctioning stability control module (approx. 30% likelihood) - The module may fail due to age or electrical issues, impacting system performance.
  3. Wheel speed sensor issues (approx. 20% likelihood) - Damaged sensors can provide incorrect data, leading to system faults.
  4. Less common but serious cause includes a software glitch in the vehicle’s stability control system, which might require a firmware update.
  5. Rarely, issues with the vehicle's central computer can lead to this code, though this is less frequent.

C086C Repair Costs

Cost Breakdown by Repair Type

Wiring Repair

Repair of damaged wiring or connectors within the stability control system

  • Total: $150 - $300
  • Success rate: 85%
Stability Control Module Replacement

Replacement of a faulty stability control module

  • Total: $400 - $800
  • Success rate: 90%
Wheel Speed Sensor Replacement

Replacing defective wheel speed sensors that affect system performance

  • Total: $100 - $250
  • Success rate: 80%
Money-Saving Tips for C086C
  • 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 C086C Diagnosis Process

Follow these systematic steps to accurately diagnose C086C. 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 that could affect the stability control system

Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion that could affect the stability control system.

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; ensure the GeekOBD APP is up to date for comprehensive results

Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context; ensure the GeekOBD APP is up to date for comprehensive results.

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 suspected components such as wheel speed sensors and the stability control module for functionality

Step 3: Component testing - Use a multimeter to test suspected components such as wheel speed sensors and the stability control module for functionality.

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, verify proper operation of the stability control system and clear codes using the GeekOBD APP

Step 4: System function test - After repairs, verify proper operation of the stability control system and clear codes using the GeekOBD APP.

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 repair has resolved the issue and that stability is restored

Step 5: Road test verification - Drive the vehicle under various conditions to confirm that the repair has resolved the issue and that stability is restored.

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: Stability Control Module Failure in 2017 Chevrolet Silverado

Vehicle: 2017 Chevrolet Silverado, 45,000 miles

Problem: Customer reported check engine light and traction control light illuminated.

Diagnosis: Performed a full diagnostic scan using GeekOBD APP, revealing code C086C. Visual inspection showed corroded wiring.

Solution: Repaired wiring and replaced the stability control module.

Cost: $650 (parts: $400 for module, $250 for wiring repair)

Result: Post-repair road test confirmed stability control function restored, no further codes present.

Case Study 2: Wheel Speed Sensor Replacement in 2019 GMC Sierra

Vehicle: 2019 GMC Sierra, 30,000 miles

Problem: Customer experienced loss of traction control and ABS activation issues.

Diagnosis: Diagnostic scan showed C086C along with other codes related to wheel speed sensors.

Solution: Replaced the faulty left front wheel speed sensor.

Cost: $180 (parts: $100 for sensor, $80 labor)

Result: Stability and traction control restored, no further issues reported.

Diagnose C086C

Use GeekOBD APP for professional diagnosis!

  • Real-time data monitoring
  • Advanced diagnostic features
  • Step-by-step repair guidance
  • Professional-grade analysis
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Code Information

Code: C086C
System: Chassis (ABS, Steering, Suspension)
Severity: HIGH
Category: Chassis Codes