Quick Answer
C0079 means: C0079 indicates a problem with the steering angle sensor circuit, affecting vehicle stability.
Can I drive with C0079? Immediate attention is recommended to prevent safety issues and further damage.
Common Questions
What does C0079 mean and how does it affect my car?
C0079 indicates a steering angle sensor fault, which can affect vehicle stability and control. Ignoring this issue might lead to unpredictable handling, especially in adverse weather conditions.
What are the most common causes of C0079 and how much does it cost to fix?
The most common causes include a faulty steering angle sensor and damaged wiring. Repair costs can range from $50 to $400 depending on whether you need a sensor replacement or wiring repair.
Can I drive my car with C0079 or should I stop immediately?
While you might be able to drive your car, it is not recommended. The vehicle's handling could become unpredictable, posing a safety risk. It's best to have it inspected as soon as possible.
How can I diagnose C0079 myself using GeekOBD APP?
You can use the GeekOBD APP to scan for codes and freeze frame data, which will help you understand the context of the error. Look for specific parameters that may indicate sensor failure.
What vehicles are most commonly affected by C0079?
C0079 is commonly seen in vehicles like the 2013-2017 Chevrolet Silverado and 2014-2018 GMC Sierra. These vehicles may have recalls or technical service bulletins related to this code.
How can I prevent C0079 from happening again?
Routine maintenance of the steering system and regular inspections of electrical connections can help prevent issues. Ensure proper alignment and calibration after any steering repairs.
What is C0079?
The diagnostic trouble code (DTC) C0079 indicates a malfunction in the steering angle sensor circuit. This sensor plays a crucial role in the stability control and traction control systems of modern vehicles. When the steering angle sensor fails or sends incorrect data to the vehicle's computer, it can lead to a variety of issues. Drivers might notice symptoms such as the traction control or stability control warning lights illuminating on the dashboard. This code is particularly prevalent in vehicles from manufacturers like Chevrolet and GMC, especially in models like the 2013-2017 Chevrolet Silverado and 2014-2018 GMC Sierra. Ignoring this code can cause the vehicle's handling to become unpredictable, particularly in slippery conditions, since the stability control systems rely heavily on accurate steering angle data. In some cases, it may even lead to further damage to the vehicle's electronic systems or worsen the overall driving experience. It's essential for vehicle owners to address this code promptly to ensure their safety on the road and maintain the functionality of critical driving aids.
System: C - Chassis (ABS, Steering, Suspension)
Symptoms
Common symptoms when C0079 is present:
- Check engine light or stability control light stays illuminated, which can be a consistent distraction while driving.
- Unusual handling behavior, such as the vehicle pulling to one side or feeling unstable during turns.
- Difficulty in steering, which may feel heavier or lighter than normal, affecting overall vehicle control.
- Increased wear on tires due to improper alignment caused by inaccurate sensor data.
- Unexpected activation of traction control or stability control systems, which may engage during normal driving conditions.
Possible Causes
Most common causes of C0079 (ordered by frequency):
- The most common cause of C0079 is a faulty steering angle sensor, which has a 60% likelihood; this can be due to wear and tear or electrical issues.
- A damaged wiring harness or loose connection is the second most common cause, accounting for about 25%. Corrosion or fraying can disrupt the sensor's signal.
- Incorrect calibration of the steering angle sensor is a third cause, which can often be rectified by proper alignment and resetting procedures.
- Less common but serious causes could include a malfunctioning electronic control module (ECM), which requires professional diagnosis.
- Rarely, issues with the vehicle's power steering system can lead to the C0079 code, generally related to hydraulic problems.
C0079 Repair Costs
Cost Breakdown by Repair Type
Steering Angle Sensor Replacement
Replacing the faulty steering angle sensor with a new part.
- Total: $150 - $400
- Success rate: 85%
Wiring Repair
Repairing damaged wiring or loose connections in the sensor circuit.
- Total: $50 - $150
- Success rate: 75%
Money-Saving Tips for C0079
- 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 C0079 Diagnosis Process
Follow these systematic steps to accurately diagnose C0079. 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 (5-10 minutes)
Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion (5-10 minutes).
Step 2: Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context (10-15 minutes)
Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context (10-15 minutes).
Step 3: Step 3: Component testing - Use a multimeter or specific diagnostic tools to test the steering angle sensor and wiring (20-30 minutes)
Step 3: Component testing - Use a multimeter or specific diagnostic tools to test the steering angle sensor and wiring (20-30 minutes).
Step 4: Step 4: System function test - Verify proper operation of the steering angle sensor after repairs and clear codes (10-15 minutes)
Step 4: System function test - Verify proper operation of the steering angle sensor after repairs and clear codes (10-15 minutes).
Step 5: Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and monitor for warning lights (15-20 minutes)
Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and monitor for warning lights (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 2014 Chevrolet Silverado
Vehicle: 2014 Chevrolet Silverado, 80,000 miles
Problem: Customer reported stability control light on and difficulty steering.
Diagnosis: Initial checks revealed a fault code for the steering angle sensor. Further testing confirmed the sensor was not sending accurate data.
Solution: Replaced the steering angle sensor and recalibrated the system.
Cost: $250 (sensor $200, labor $50)
Result: The stability control light was cleared, and the vehicle handled normally after the repair.
Case Study 2: Wiring Repair in a 2017 GMC Sierra
Vehicle: 2017 GMC Sierra, 65,000 miles
Problem: Customer noticed the traction control light was on and experienced erratic steering.
Diagnosis: Found damaged wiring in the steering angle sensor circuit causing intermittent failures.
Solution: Repaired wiring and secured loose connections.
Cost: $100 (labor $50, parts $50)
Result: Resolved the issue with no further warning lights present.