Quick Answer
C0859 means: C0859 indicates a steering angle sensor calibration error.
Can I drive with C0859? Immediate attention is required to ensure vehicle safety and performance.
Common Questions
What does C0859 mean and how does it affect my car?
C0859 indicates a calibration error with the steering angle sensor, which is crucial for vehicle safety systems. If this sensor fails, it can lead to poor handling, reduced effectiveness of traction and stability control, and increased risk of accidents. Immediate attention is recommended to avoid safety hazards.
What are the most common causes of C0859 and how much does it cost to fix?
The most common cause of C0859 is a faulty steering angle sensor, which can cost between $150 and $300 to replace. Other causes include wiring issues (costing $50 to $150), and control module problems, which can be more expensive, ranging from $200 to $600.
Can I drive my car with C0859 or should I stop immediately?
Driving with a C0859 code is not advisable as it compromises your vehicle's safety systems. If you notice symptoms like unresponsive steering or unexpected stability control activation, it's best to stop driving and have the vehicle inspected immediately.
How can I diagnose C0859 myself using GeekOBD APP?
Using the GeekOBD APP, you can scan your vehicle for codes, view real-time data from the steering angle sensor, and check for any discrepancies. The app will also provide freeze frame data, helping you understand the context in which the C0859 code was triggered.
What vehicles are most commonly affected by C0859?
C0859 is frequently reported in vehicles like the 2013-2018 Ford Fusion, 2014-2018 Chevrolet Malibu, and 2015-2019 Nissan Altima. Always check for any recalls or technical service bulletins (TSBs) related to steering systems in your vehicle.
How can I prevent C0859 from happening again?
To prevent C0859, ensure regular maintenance of your steering system, including timely inspections after any repairs. Always recalibrate the steering angle sensor when replacing the steering wheel or making suspension adjustments.
What is C0859?
The diagnostic trouble code (DTC) C0859 indicates a steering angle sensor calibration error, which is a critical component in modern vehicles, especially those equipped with advanced driver-assistance systems (ADAS). This sensor's primary role is to provide information regarding the angle of the steering wheel to the vehicle's onboard computer. When the system detects a discrepancy in the expected angle versus the actual angle, it triggers the C0859 code. This can lead to various issues, including reduced effectiveness of systems like electronic stability control (ESC) and traction control, which rely on accurate steering feedback to function correctly. For vehicle owners, this means potential handling issues, increased stopping distances, and a heightened risk of accidents, particularly in adverse driving conditions. Vehicles like the 2013-2018 Ford Fusion, 2014-2018 Chevrolet Malibu, and 2015-2019 Nissan Altima are known to encounter this issue. If left unresolved, not only could the safety systems be compromised, but it could also lead to more extensive repairs down the line. Therefore, understanding this code's implications is essential for maintaining vehicle safety and performance.
System: C - Chassis (ABS, Steering, Suspension)
Symptoms
Common symptoms when C0859 is present:
- The check engine light remains illuminated, indicating that the vehicle's computer has detected an issue.
- The steering feels unresponsive or inconsistent, leading to difficulty in maintaining a straight line while driving.
- The vehicle's stability control system may engage unexpectedly, causing the brakes to activate without driver input, which can be dangerous.
- A noticeable drift in one direction while driving straight, suggesting an incorrect alignment or sensor reading.
- The vehicle may experience abnormal tire wear due to improper steering angles being communicated to the suspension system.
Possible Causes
Most common causes of C0859 (ordered by frequency):
- The most common cause is a faulty steering angle sensor, which occurs in approximately 60% of cases. This sensor may wear out over time or become misaligned due to impacts or rough driving conditions.
- The second most common cause involves issues with wiring or connectors related to the sensor, which may lead to intermittent signal loss. This accounts for about 25% of cases.
- Another potential cause is a calibration error after undergoing steering wheel replacement or suspension repairs. Preventing this requires proper recalibration after any steering-related work.
- Less common but serious causes include issues with the vehicle's control module, which may require reprogramming or replacement.
- A rare cause could be software glitches in the vehicle's onboard computer, potentially requiring a firmware update from the manufacturer.
C0859 Repair Costs
Cost Breakdown by Repair Type
Steering Angle Sensor Replacement
Replacing the faulty steering angle sensor to restore proper functionality.
- Total: $150 - $300
- Success rate: 90%
Wiring Repair
Repairing or replacing damaged wiring or connectors related to the steering angle sensor.
- Total: $50 - $150
- Success rate: 80%
Control Module Reprogramming
Reprogramming or replacing the control module if the issue lies within the vehicle's computer.
- Total: $200 - $600
- Success rate: 70%
Money-Saving Tips for C0859
- 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 C0859 Diagnosis Process
Follow these systematic steps to accurately diagnose C0859. 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 around the steering column (5-10 minutes)
Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion around the steering column (5-10 minutes).
Step 2: Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context and check for additional codes that may help identify the issue (10-15 minutes)
Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context and check for additional codes that may help identify the issue (10-15 minutes).
Step 3: Step 3: Component testing - Use a multimeter to test the steering angle sensor's voltage output to ensure it's functioning within specifications (20-30 minutes)
Step 3: Component testing - Use a multimeter to test the steering angle sensor's voltage output to ensure it's functioning within specifications (20-30 minutes).
Step 4: Step 4: System function test - After any repairs or recalibrations, verify proper operation by checking sensor data in real-time through the GeekOBD APP (10-15 minutes)
Step 4: System function test - After any repairs or recalibrations, verify proper operation by checking sensor data in real-time through the GeekOBD APP (10-15 minutes).
Step 5: Step 5: Road test verification - Drive the vehicle under various conditions to confirm that all systems are functioning correctly and that the C0859 code does not reappear (15-20 minutes)
Step 5: Road test verification - Drive the vehicle under various conditions to confirm that all systems are functioning correctly and that the C0859 code does not reappear (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 2016 Ford Fusion
Vehicle: 2016 Ford Fusion, 60,000 miles
Problem: Customer reported the check engine light on and unresponsive steering.
Diagnosis: After scanning with GeekOBD APP, C0859 was confirmed. Visual inspection showed a faulty steering angle sensor.
Solution: Replaced the steering angle sensor and recalibrated the system using the GeekOBD APP.
Cost: $250 (Parts: $150, Labor: $100)
Result: The check engine light was off, and the steering response was restored to normal.
Case Study 2: Wiring Repair for 2014 Chevrolet Malibu
Vehicle: 2014 Chevrolet Malibu, 75,000 miles
Problem: The vehicle exhibited drifting and stability control activation without reason.
Diagnosis: OBD scan revealed C0859; wiring issues were suspected based on symptoms.
Solution: Repaired damaged wiring and ensured secure connections to the steering angle sensor.
Cost: $100 (Parts: $20, Labor: $80)
Result: Stability control functioned correctly after repairs, and no further codes appeared.