Quick Answer
C0771 means: DTC C0771 refers to a steering angle sensor calibration error, affecting the vehicle's stability control system.
Can I drive with C0771? Immediate attention is recommended to ensure safe vehicle operation.
Common Questions
What does C0771 mean and how does it affect my car?
DTC C0771 indicates a calibration error in the steering angle sensor, crucial for your vehicle's stability control. If not addressed, it can lead to handling issues and increased tire wear.
What are the most common causes of C0771 and how much does it cost to fix?
Common causes include a miscalibrated steering angle sensor, damaged wiring, or software issues. Repair costs typically range from $100 for recalibration to $400 for sensor replacement.
Can I drive my car with C0771 or should I stop immediately?
It's advisable to address the C0771 code promptly. Driving with this issue can compromise vehicle handling and safety, especially in adverse conditions.
How can I diagnose C0771 myself using GeekOBD APP?
With the GeekOBD APP, connect to your vehicle’s OBD2 port, retrieve the C0771 code, and view live data from the steering angle sensor for further insights.
What vehicles are most commonly affected by C0771?
Commonly affected vehicles include the 2015-2019 Chevrolet Silverado and the 2016-2018 GMC Sierra, among others equipped with stability control systems.
How can I prevent C0771 from happening again?
Regularly inspect steering components, ensure proper alignment, and avoid collisions to minimize the risk of steering angle sensor issues.
What is C0771?
DTC C0771 indicates a steering angle sensor calibration error, which is crucial for the stability control system in your vehicle. This code commonly appears in vehicles equipped with electronic stability control (ESC) systems, notably in models from Chevrolet and GMC, such as the 2015-2019 Chevrolet Silverado and the 2016-2018 GMC Sierra. When the steering angle sensor is not calibrated correctly, it can lead to a host of issues including improper handling, increased tire wear, and reduced effectiveness of traction control. The sensor itself measures the angle of the steering wheel, which helps the vehicle’s computer determine how to adjust braking and engine power for optimal handling. If you ignore this code, you may experience symptoms like the ABS and traction control lights illuminating on your dashboard. Additionally, if the vehicle is driven without addressing this issue, it could lead to more severe problems, including loss of control in slippery conditions. Therefore, understanding and addressing DTC C0771 is critical for maintaining vehicle safety and performance.
System: C - Chassis (ABS, Steering, Suspension)
Symptoms
Common symptoms when C0771 is present:
- Check engine light and ABS light illuminate simultaneously, indicating issues with the stability control system.
- Steering feels unresponsive or misaligned, making it difficult to control the vehicle, especially during turns.
- Increased wear on tires due to improper alignment and handling, which can lead to costly replacements.
- Vehicle stability control may activate unexpectedly, causing unnecessary braking and affecting driver confidence.
- Unusual noises coming from the steering column, which may indicate issues with the sensor or its connections.
Possible Causes
Most common causes of C0771 (ordered by frequency):
- The most common cause is a miscalibrated steering angle sensor, which accounts for about 70% of cases. This typically occurs after a collision or when the steering column is serviced.
- Another cause could be damaged wiring or connectors leading to the sensor, which can disrupt communication between the sensor and the vehicle's computer.
- A third potential cause includes software issues within the vehicle's electronic control unit (ECU), which can often be resolved with a simple update.
- Less common but serious is the failure of the steering angle sensor itself, which may require replacement.
- In rare cases, issues with the ABS module can also trigger this fault, necessitating further diagnosis.
C0771 Repair Costs
Cost Breakdown by Repair Type
Steering Angle Sensor Recalibration
Recalibrating the existing steering angle sensor using diagnostic tools.
- Total: $100 - $200
- Success rate: 85%
Replacement of Steering Angle Sensor
Replacing a faulty steering angle sensor with a new unit.
- Total: $200 - $400
- Success rate: 95%
Wiring Repairs
Repairing or replacing damaged wiring or connectors that lead to the sensor.
- Total: $50 - $150
- Success rate: 75%
Money-Saving Tips for C0771
- 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 C0771 Diagnosis Process
Follow these systematic steps to accurately diagnose C0771. Each step builds on the previous one to ensure accurate diagnosis.
Step 1: Step 1: Begin with an initial visual inspection of the steering column and surrounding wiring for any signs of damage or wear (5-10 minutes)
Step 1: Begin with an initial visual inspection of the steering column and surrounding wiring for any signs of damage or wear (5-10 minutes).
Step 2: Step 2: Use an OBD2 scanner or the GeekOBD APP to retrieve the DTC and any related codes, along with freeze frame data, to understand the operating conditions when the fault occurred (10-15 minutes)
Step 2: Use an OBD2 scanner or the GeekOBD APP to retrieve the DTC and any related codes, along with freeze frame data, to understand the operating conditions when the fault occurred (10-15 minutes).
Step 3: Step 3: Perform component testing of the steering angle sensor with a multimeter to ensure it operates within manufacturer specifications (20-30 minutes)
Step 3: Perform component testing of the steering angle sensor with a multimeter to ensure it operates within manufacturer specifications (20-30 minutes).
Step 4: Step 4: If necessary, recalibrate the steering angle sensor using the OBD2 scan tool or GeekOBD APP, following the manufacturer's guidelines (10-15 minutes)
Step 4: If necessary, recalibrate the steering angle sensor using the OBD2 scan tool or GeekOBD APP, following the manufacturer's guidelines (10-15 minutes).
Step 5: Step 5: Conduct a road test to verify that the issue has been resolved and that all warning lights are off (15-20 minutes)
Step 5: Conduct a road test to verify that the issue has been resolved and that all warning lights are off (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 Calibration on 2016 Chevrolet Silverado
Vehicle: 2016 Chevrolet Silverado, 45,000 miles
Problem: Customer reported warning lights for ABS and traction control; vehicle felt unstable during turns.
Diagnosis: Performed an OBD2 scan, confirmed C0771 code, and checked the steering angle sensor’s performance.
Solution: Recalibrated the steering angle sensor using the GeekOBD APP, resolving the issue.
Cost: $150 (including labor and calibration fee)
Result: Customer reported improved handling and no more warning lights.
Case Study 2: Faulty Steering Angle Sensor Replacement on 2017 GMC Sierra
Vehicle: 2017 GMC Sierra, 60,000 miles
Problem: ABS light illuminated, and steering felt unresponsive.
Diagnosis: Scanned for codes, found C0771; sensor was malfunctioning.
Solution: Replaced the steering angle sensor and recalibrated with diagnostic tools.
Cost: $350 (parts and labor included)
Result: After repair, the vehicle operated normally with no warning lights.