Quick Answer
C0985 means: C0985 indicates a malfunction in the steering angle sensor, affecting vehicle stability and handling.
Can I drive with C0985? Immediate attention is recommended to ensure driving safety.
Common Questions
What does C0985 mean and how does it affect my car?
The C0985 code indicates a malfunctioning steering angle sensor, which is crucial for vehicle stability and safety. If this sensor fails, it can lead to poor handling, increased risk of accidents, and may illuminate warning lights on your dashboard.
What are the most common causes of C0985 and how much does it cost to fix?
Common causes include a faulty steering angle sensor, wiring issues, or calibration errors. Repair costs can range from $150 to $400 depending on whether you need a sensor replacement or just wiring repairs.
Can I drive my car with C0985 or should I stop immediately?
Driving with a C0985 code is risky. It's best to avoid driving until the issue is resolved, as it could lead to loss of control, especially in adverse conditions.
How can I diagnose C0985 myself using GeekOBD APP?
Use the GeekOBD APP to scan your vehicle for DTCs, check the steering angle sensor data, and monitor for any unusual readings or patterns that might indicate a malfunction.
What vehicles are most commonly affected by C0985?
The C0985 code is often seen in models like the 2015-2019 Ford F-150, 2016-2020 Chevrolet Silverado, and select Chrysler models. It's advisable to check for any recalls or technical service bulletins relevant to your vehicle.
How can I prevent C0985 from happening again?
Regular maintenance, including inspections of the steering system and prompt attention to any warning lights, can help prevent future occurrences of C0985. Keeping the vehicle's software updated is also beneficial.
What is C0985?
The diagnostic trouble code (DTC) C0985 refers to a malfunction in the steering angle sensor, which is a critical component in modern vehicles, particularly for those equipped with electronic stability control (ESC) and advanced driver-assistance systems (ADAS). This sensor monitors the position of the steering wheel and communicates with the vehicle's computer systems to help manage vehicle stability during cornering and sudden maneuvers. When the C0985 code is triggered, it indicates that the steering angle sensor is failing to provide accurate data, which can lead to compromised vehicle handling. This may manifest as difficulty in steering, an unstable vehicle during turns, or the illumination of the check engine or stability control warning lights on the dashboard. Ignoring this code can result in significant safety risks, including loss of control in critical driving situations. Car owners should consider this code urgent, as it directly impacts steering performance and overall vehicle safety.
System: C - Chassis (ABS, Steering, Suspension)
Symptoms
Common symptoms when C0985 is present:
- The check engine light or stability control light may illuminate, indicating a fault in the steering system.
- You might experience a noticeable delay or inconsistency in steering response, making it feel unresponsive or overly sensitive.
- The vehicle may exhibit difficulty in maintaining a straight path, especially during turns, leading to a sensation of instability.
- Increased tire wear may occur due to improper alignment caused by the sensor malfunction, which should be regularly monitored.
- In some cases, the cruise control may become inoperable, as it relies on accurate steering data to function correctly.
Possible Causes
Most common causes of C0985 (ordered by frequency):
- {'cause': 'Faulty steering angle sensor - 60% likelihood. The sensor can wear out over time due to exposure to environmental conditions or electrical issues.', 'details': 'This is the most common issue leading to the C0985 code, often requiring replacement of the sensor itself.'}
- {'cause': "Wiring or connector issues - 25% likelihood. Damaged wiring or poor connections can interrupt the signal from the sensor to the vehicle's computer.", 'technicalExplanation': 'Corrosion or broken wires can lead to intermittent signals, prompting the system to register a fault.'}
- {'cause': 'Calibration errors - 10% likelihood. If the steering angle sensor is not calibrated correctly after installation or repairs, it may not function properly.', 'preventionTips': 'Ensure proper calibration whenever the sensor is replaced or if the steering system is serviced.'}
- {'cause': "Software glitches - 3% likelihood. Occasionally, the vehicle's firmware may have bugs that affect sensor readings.", 'details': "Updating the vehicle's software can resolve these issues, especially in newer models."}
- {'cause': 'Mechanical issues with the steering column - 2% likelihood. Problems in the steering mechanism can impact sensor readings.', 'details': 'Inspecting the steering system for physical obstructions or damage is crucial.'}
C0985 Repair Costs
Cost Breakdown by Repair Type
Steering Angle Sensor Replacement
Replacing a faulty steering angle sensor to restore accurate readings.
- Total: $150 - $400
- Success rate: 90%
Wiring Repair
Repairing damaged wiring or connectors that disrupt sensor signals.
- Total: $50 - $150
- Success rate: 80%
Calibration Service
Calibrating the new sensor after replacement to ensure accurate readings.
- Total: $50 - $100
- Success rate: 100%
Money-Saving Tips for C0985
- 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 C0985 Diagnosis Process
Follow these systematic steps to accurately diagnose C0985. 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 steering angle sensor circuit (5-10 minutes)
Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion in the steering angle sensor circuit (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 any related issues (10-15 minutes)
Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context and any related issues (10-15 minutes).
Step 3: Step 3: Component testing - Use a multimeter or specific diagnostic tools to test the steering angle sensor and its wiring for continuity and correct voltage (20-30 minutes)
Step 3: Component testing - Use a multimeter or specific diagnostic tools to test the steering angle sensor and its wiring for continuity and correct voltage (20-30 minutes).
Step 4: Step 4: System function test - Verify proper operation of the steering angle sensor after repairs and clear codes using the GeekOBD APP (10-15 minutes)
Step 4: System function test - Verify proper operation of the steering angle sensor after repairs 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 repair success and ensure stability control systems function correctly (15-20 minutes)
Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and ensure stability control systems function correctly (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 on a 2017 Ford F-150
Vehicle: 2017 Ford F-150, 65,000 miles
Problem: Customer reported instability during turns and a constant check engine light.
Diagnosis: Diagnostic scan revealed code C0985 along with faulty sensor readings.
Solution: Replaced the steering angle sensor and recalibrated the system using GeekOBD APP.
Cost: $350 (sensor - $300, labor - $50)
Result: Vehicle handling improved significantly, and warning lights cleared.
Case Study 2: Wiring Repair on a 2018 Chevrolet Silverado
Vehicle: 2018 Chevrolet Silverado, 30,000 miles
Problem: Customer experienced intermittent steering issues and a flashing stability control light.
Diagnosis: Inspection revealed damaged wiring in the steering angle sensor circuit.
Solution: Repaired wiring connections and ensured proper insulation.
Cost: $100 (repair materials - $50, labor - $50)
Result: Steering response returned to normal with no further issues.