Quick Answer
C086E means: C086E indicates a fault in the Electronic Power Steering (EPS) system, often related to communication issues.
Can I drive with C086E? Immediate inspection is recommended as this affects steering functionality.
Common Questions
What does C086E mean and how does it affect my car?
C086E indicates a fault in the Electronic Power Steering system, affecting steering responsiveness and safety. If ignored, it can lead to more serious steering failures.
What are the most common causes of C086E and how much does it cost to fix?
Common causes include a faulty steering angle sensor, damaged wiring, or a malfunctioning EPS module. Repair costs typically range from $100 to $700 depending on the issue.
Can I drive my car with C086E or should I stop immediately?
It is advised to stop driving as soon as possible. A malfunctioning EPS can lead to steering failure, making the vehicle unsafe to operate.
How can I diagnose C086E myself using GeekOBD APP?
Use the GeekOBD APP to scan for codes and access freeze frame data. This will help you identify the context of the issue and guide your troubleshooting.
What vehicles are most commonly affected by C086E?
DTC C086E is commonly seen in 2015-2018 Chevrolet Silverado and GMC Sierra models, as well as some other GM vehicles from this era.
How can I prevent C086E from happening again?
Regular maintenance such as checking wiring connections, keeping the EPS system clean, and timely repairs can help prevent future occurrences of C086E.
What is C086E?
The Diagnostic Trouble Code (DTC) C086E typically indicates an issue with the vehicle's steering control system, specifically relating to the Electronic Power Steering (EPS) system. This code suggests that the EPS control module has detected a fault in the communication with the steering angle sensor or another related component. In real-world terms, if your vehicle is throwing a C086E code, you might notice symptoms like a stiff steering wheel, difficulty turning the steering, or a warning light on your dashboard. This problem is particularly common in 2015-2018 Chevrolet Silverado models, where electrical issues can arise due to wear or corrosion in the wiring harness connected to the EPS system. Ignoring this code can lead to steering system failures, which may compromise vehicle safety and drivability. Therefore, it is crucial to address the C086E issue promptly to ensure optimal performance and safety of your vehicle.
System: C - Chassis (ABS, Steering, Suspension)
Symptoms
Common symptoms when C086E is present:
- The steering wheel feels unusually stiff, making it hard to maneuver the vehicle, especially at low speeds.
- Dashboard warning lights illuminate, typically showing a steering wheel icon or a check engine light, indicating a potential EPS issue.
- Unusual noises, such as whining or grinding, may also be heard when turning the steering wheel, suggesting mechanical problems within the EPS system.
- Inconsistent steering response, where the steering may feel loose or unresponsive at times, leading to a lack of control.
- A noticeable decrease in fuel efficiency as the vehicle's power steering system struggles to operate correctly.
Possible Causes
Most common causes of C086E (ordered by frequency):
- The most common cause of C086E is a faulty steering angle sensor, occurring in about 40% of cases. This sensor may fail due to wear and tear or electrical faults.
- Another prevalent cause is damaged wiring or connectors related to the EPS system, which can account for around 30% of C086E occurrences. Corrosion or physical damage can disrupt communication between components.
- A malfunctioning EPS control module is also a possibility, with a likelihood of about 20%. This can be due to software issues or hardware failures.
- Less common but serious causes include mechanical failures in the power steering system itself, such as a failing power steering pump, which could lead to severe steering issues.
- Rarely, issues with the vehicle's battery or charging system can throw a C086E code, especially if there are voltage irregularities affecting electronic components.
C086E Repair Costs
Cost Breakdown by Repair Type
Steering Angle Sensor Replacement
Replacing a faulty steering angle sensor that has been identified as the root cause of the C086E code.
- Total: $150 - $300
- Success rate: 85%
Wiring Repair
Repairing damaged wiring or connectors related to the EPS system to restore proper communication.
- Total: $100 - $250
- Success rate: 75%
EPS Control Module Replacement
Replacing the EPS control module if it is found to be defective.
- Total: $400 - $700
- Success rate: 90%
Money-Saving Tips for C086E
- 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 C086E Diagnosis Process
Follow these systematic steps to accurately diagnose C086E. 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 EPS wiring harness (5-10 minutes)
Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion in the EPS wiring harness (5-10 minutes).
Step 2: Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes, including freeze frame data, to understand the context of the fault (10-15 minutes)
Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes, including freeze frame data, to understand the context of the fault (10-15 minutes).
Step 3: Step 3: Component testing - Use a multimeter to test the steering angle sensor and inspect the EPS control module for faults (20-30 minutes)
Step 3: Component testing - Use a multimeter to test the steering angle sensor and inspect the EPS control module for faults (20-30 minutes).
Step 4: Step 4: System function test - After making repairs, verify the proper operation of the EPS system and clear codes using the GeekOBD APP (10-15 minutes)
Step 4: System function test - After making repairs, verify the proper operation of the EPS system and clear codes using the GeekOBD APP (10-15 minutes).
Step 5: Step 5: Road test verification - Drive the vehicle under various conditions to confirm successful repair of the EPS system (15-20 minutes)
Step 5: Road test verification - Drive the vehicle under various conditions to confirm successful repair of the EPS system (15-20 minutes).
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 Angle Sensor Replacement in a 2017 Chevrolet Silverado
Vehicle: 2017 Chevrolet Silverado, 60,000 miles
Problem: Customer reported steering difficulties and a persistent C086E code.
Diagnosis: A diagnostic scan revealed a faulty steering angle sensor, confirmed by component testing with the GeekOBD APP.
Solution: Replaced the steering angle sensor and recalibrated the EPS system.
Cost: $250 (sensor $150, labor $100)
Result: Steering responsiveness improved, and the C086E code was cleared successfully.
Case Study 2: Wiring Repair for EPS Issue in a 2016 GMC Sierra
Vehicle: 2016 GMC Sierra, 75,000 miles
Problem: Customer noticed steering stiffness and warning lights appeared on the dashboard.
Diagnosis: A visual inspection showed damaged wiring in the EPS harness, which was confirmed by testing.
Solution: Repaired the damaged wiring and checked all connections.
Cost: $180 (labor $100, parts $80)
Result: The steering issue was resolved, and the EPS system functioned normally post-repair.