Quick Answer
C0773 means: C0773 signifies a fault in the steering angle sensor circuit, affecting vehicle stability controls.
Can I drive with C0773? Immediate attention is recommended to ensure safe vehicle operation.
Common Questions
What does C0773 mean and how does it affect my car?
C0773 indicates a malfunction in the steering angle sensor circuit, which is vital for your vehicle's stability and traction controls. If this code is present, you may experience difficulties steering, and your vehicle's ability to handle slippery conditions could be compromised, leading to dangerous driving situations.
What are the most common causes of C0773 and how much does it cost to fix?
The most common cause of C0773 is a faulty steering angle sensor, which typically costs between $150 to $300 to replace. Other causes include damaged wiring, which can be repaired for $100 to $200, and potential PCM issues that may require reprogramming at a cost of $75 to $150.
Can I drive my car with C0773 or should I stop immediately?
It is not advisable to drive your vehicle with a C0773 code. This issue can affect your steering responsiveness and stability control, posing a serious safety risk. It's best to get it diagnosed and repaired as soon as possible to ensure your safety.
How can I diagnose C0773 myself using GeekOBD APP?
To diagnose C0773 using the GeekOBD APP, connect your device to the vehicle's OBD2 port and follow the app's prompts to retrieve diagnostic trouble codes. Pay attention to any additional codes that may appear, as they can provide context for the C0773 issue. Use the freeze frame data feature to see under what conditions the code was triggered.
What vehicles are most commonly affected by C0773?
C0773 is commonly found in various General Motors vehicles, particularly the Chevrolet Silverado and GMC Sierra models manufactured between 2014 and 2019. Drivers of these vehicles should be vigilant for symptoms associated with this DTC.
How can I prevent C0773 from happening again?
To prevent C0773 from recurring, ensure regular maintenance of your vehicle's steering system. Keep the steering components clean and free from debris, and have any steering-related issues addressed promptly to avoid further damage.
What is C0773?
The diagnostic trouble code (DTC) C0773 indicates an issue with the steering angle sensor circuit in certain General Motors (GM) vehicles, including popular models like the Chevrolet Silverado (2014-2019) and GMC Sierra (2014-2019). This sensor is crucial for the vehicle's stability control and traction control systems, as it measures the angle of the steering wheel. When the C0773 code is triggered, it means that the powertrain control module (PCM) has detected an abnormal signal or a malfunction in the steering angle sensor circuit. This can lead to several issues including reduced steering responsiveness, compromised stability control, and potential accidents if not addressed promptly. If you notice the check engine light illuminating alongside symptoms like erratic steering behavior or warning messages on the dashboard, it is essential to address this issue as it affects both safety and vehicle performance. Ignoring the C0773 code can lead to further complications and expensive repairs down the line, making it imperative to understand and rectify the underlying problem as soon as possible.
System: C - Chassis (ABS, Steering, Suspension)
Symptoms
Common symptoms when C0773 is present:
- The check engine light remains illuminated, indicating a persistent issue that needs attention.
- You may experience erratic steering or a noticeable delay in response when turning the wheel, making driving uncomfortable and potentially hazardous.
- Drivers might notice that the vehicle's stability control and traction control warning lights also activate, signaling a broader issue with the vehicle's control systems.
- In some cases, you may hear unusual noises when turning the steering wheel, which suggests mechanical issues alongside the electronic fault.
- There could be a significant decrease in fuel efficiency, as the vehicle may struggle to properly manage power distribution due to the sensor's failure.
Possible Causes
Most common causes of C0773 (ordered by frequency):
- The most common cause of C0773 is a faulty steering angle sensor itself, which can account for around 60% of cases. This sensor can wear out over time or fail due to exposure to moisture or debris.
- Another potential cause is damaged wiring or connectors within the steering angle sensor circuit. This could result from wear and tear or an accident, leading to about 25% of the occurrences of this code.
- A third cause could be issues with the powertrain control module (PCM), which is responsible for processing the signals from various sensors. This could be rare but might occur if the PCM is malfunctioning or needs reprogramming.
- Less commonly, a misalignment of the steering wheel or steering column can lead to a false reading from the sensor, contributing to the C0773 code.
- Lastly, a rare cause could be a software glitch in the vehicle's stability control system, which may require an update or reprogramming to resolve.
C0773 Repair Costs
Cost Breakdown by Repair Type
Steering Angle Sensor Replacement
Replacing the faulty steering angle sensor with a new OEM part to restore proper functionality.
- Total: $150 - $300
- Success rate: 90%
Wiring Repair
Repairing or replacing damaged wiring and connectors in the steering angle sensor circuit.
- Total: $100 - $200
- Success rate: 80%
PCM Reprogramming
Reprogramming the powertrain control module to correct software issues if the PCM is not functioning correctly.
- Total: $75 - $150
- Success rate: 70%
Money-Saving Tips for C0773
- 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 C0773 Diagnosis Process
Follow these systematic steps to accurately diagnose C0773. 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 at the steering angle sensor and its connectors (5-10 minutes)
Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion at the steering angle sensor and its connectors (5-10 minutes).
Step 2: Step 2: OBD2 scan with GeekOBD APP - Use the GeekOBD APP to retrieve all codes and freeze frame data to understand the context of the C0773 fault (10-15 minutes)
Step 2: OBD2 scan with GeekOBD APP - Use the GeekOBD APP to retrieve all codes and freeze frame data to understand the context of the C0773 fault (10-15 minutes).
Step 3: Step 3: Component testing - Utilize a multimeter or dedicated diagnostic tool to test the steering angle sensor's resistance and voltage output to confirm its functionality (20-30 minutes)
Step 3: Component testing - Utilize a multimeter or dedicated diagnostic tool to test the steering angle sensor's resistance and voltage output to confirm its functionality (20-30 minutes).
Step 4: Step 4: System function test - After addressing any faults, verify the proper operation of the steering angle sensor and clear the codes using the GeekOBD APP (10-15 minutes)
Step 4: System function test - After addressing any faults, verify the proper operation of the steering angle sensor and clear the codes using the GeekOBD APP (10-15 minutes).
Step 5: Step 5: Road test verification - Drive the vehicle under various conditions to confirm the success of the repairs and ensure no warning lights reappear (15-20 minutes)
Step 5: Road test verification - Drive the vehicle under various conditions to confirm the success of the repairs and ensure no warning lights 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 on a 2015 Chevy Silverado
Vehicle: 2015 Chevrolet Silverado 1500, 75,000 miles
Problem: Customer reported the check engine light was on, along with traction control warnings.
Diagnosis: Diagnostic tests revealed C0773 and confirmed a malfunctioning steering angle sensor.
Solution: Replaced the steering angle sensor and recalibrated the system.
Cost: $250 (sensor $200, labor $50)
Result: The issue was resolved, and the customer reported no further warning lights.
Case Study 2: Wiring Repair on a 2016 GMC Sierra
Vehicle: 2016 GMC Sierra 1500, 50,000 miles
Problem: Customer experienced intermittent loss of traction control with check engine light illuminated.
Diagnosis: Found damaged wiring in the steering angle sensor circuit causing the C0773 code.
Solution: Repaired the damaged wiring and secured connections.
Cost: $150 (labor included)
Result: The vehicle's stability and traction control returned to normal operation.