C0747 - Understanding the Steering Angle Sensor Issue in 2014-2018 Chevrolet Silverado and Other Models

Quick Answer

C0747 means: DTC C0747 indicates a malfunction in the Steering Angle Sensor.

Fix: Check and replace faulty components Cost: $150 - $300 Time: 90-180 minutes

Can I drive with C0747? Address immediately to ensure proper vehicle handling and safety.

Common Questions

What does C0747 mean and how does it affect my car?

The C0747 code indicates a failure in the steering angle sensor, crucial for your vehicle's stability control. This malfunction can lead to erratic steering behavior, increased tire wear, and can compromise your safety while driving. Addressing this promptly is necessary to ensure your vehicle operates safely.

What are the most common causes of C0747 and how much does it cost to fix?

Common causes of C0747 include a faulty steering angle sensor, damaged wiring, or improper calibration after repairs. Repair costs typically range from $150 to $300 for sensor replacement, depending on the vehicle and labor costs.

Can I drive my car with C0747 or should I stop immediately?

It is not advisable to drive your vehicle with the C0747 code active. The steering angle sensor is critical for vehicle stability, and driving with a malfunction poses significant safety risks. It’s best to have the vehicle inspected and repaired as soon as possible.

How can I diagnose C0747 myself using GeekOBD APP?

Using the GeekOBD APP, you can perform a diagnostic scan to check for the C0747 code. The app provides freeze frame data and can help you assess if other related codes are present, guiding your troubleshooting process effectively.

What vehicles are most commonly affected by C0747?

Commonly affected vehicles include the 2014-2018 Chevrolet Silverado, GMC Sierra, and Cadillac Escalade. These models frequently experience issues with the steering angle sensor, leading to the C0747 code.

How can I prevent C0747 from happening again?

To prevent C0747 from recurring, ensure regular maintenance checks, especially after repairs involving the steering system. Keep an eye on any dashboard warning lights and address them quickly. Also, avoid rough driving conditions that could damage the steering components.

What is C0747?

The DTC code C0747 indicates a problem with the steering angle sensor, which is a crucial component in modern vehicles that helps maintain vehicle stability and control. This code specifically means that the Steering Angle Sensor has detected an issue, potentially affecting the vehicle's Electronic Stability Control (ESC) and Traction Control System (TCS). When the sensor malfunctions or sends incorrect data, it can lead to unexpected handling characteristics, increased tire wear, and even affect braking performance in critical situations. For car owners, this means that if you see the C0747 code, it’s essential to address it promptly to avoid diminished vehicle safety and performance. Common vehicles affected by this issue include 2014-2018 Chevrolet Silverado, GMC Sierra, and Cadillac Escalade. Ignoring this code could lead to more severe problems, as the ESC and TCS rely heavily on accurate steering angle readings to function correctly. Therefore, understanding the implications of this diagnostic trouble code can help you take proactive steps in maintaining your vehicle's safety and reliability.

System: C - Chassis (ABS, Steering, Suspension)

Symptoms

Common symptoms when C0747 is present:

  • Check engine light illuminates and remains on, indicating a system fault.
  • The vehicle may experience erratic steering response, making it difficult to control during turns.
  • You may notice a decrease in fuel efficiency due to the system compensating for the fault.
  • The ESC and TCS warning lights could activate on the dashboard, signaling a problem with stability control.
  • There may be a noticeable delay or lack of response when turning the steering wheel.

Possible Causes

Most common causes of C0747 (ordered by frequency):

  1. The most common cause is a faulty steering angle sensor, which is responsible for sending data to the vehicle's computer. This issue occurs in about 60% of cases.
  2. A second potential cause is damaged wiring or connectors associated with the steering sensor, which can lead to intermittent issues.
  3. Improper calibration after previous repairs can also trigger the C0747 code, suggesting a need for proper alignment and calibration.
  4. In some cases, the power steering module may fail, which is less common but can cause significant handling issues.
  5. Rarely, software glitches in the vehicle's ECU can lead to false readings from the sensor, necessitating a software update.

C0747 Repair Costs

Cost Breakdown by Repair Type

Steering Angle Sensor Replacement

Replacing the faulty steering angle sensor with a new OEM part.

  • Total: $150 - $300
  • Success rate: 95%
Money-Saving Tips for C0747
  • 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 C0747 Diagnosis Process

Follow these systematic steps to accurately diagnose C0747. 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 area (5-10 minutes)

Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion in the steering angle sensor area (5-10 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 2: Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context

Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context. Check for additional codes that may relate to the stability control system (10-15 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 3: Step 3: Component testing - Use a multimeter or specialized diagnostic tools to measure the output of the steering angle sensor and check its calibration (20-30 minutes)

Step 3: Component testing - Use a multimeter or specialized diagnostic tools to measure the output of the steering angle sensor and check its calibration (20-30 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 4: Step 4: System function test - Verify proper operation of the steering angle sensor and related systems after repairs, and clear codes (10-15 minutes)

Step 4: System function test - Verify proper operation of the steering angle sensor and related systems after repairs, and clear codes (10-15 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 5: Step 5: Road test verification - Drive the vehicle under various conditions to confirm that the repair has resolved the issue and that all systems are functioning correctly (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to confirm that the repair has resolved the issue and that all systems are functioning correctly (15-20 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.

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 Chevrolet Silverado

Vehicle: 2015 Chevrolet Silverado 1500, 75,000 miles

Problem: Customer reported the check engine light and stability control warning lights illuminated.

Diagnosis: After running a diagnostic scan with the GeekOBD APP, the C0747 code was confirmed, indicating a faulty steering angle sensor.

Solution: Replaced the steering angle sensor and recalibrated the system using the appropriate diagnostic tools.

Cost: $250 (parts: $150 for sensor, $100 for labor)

Result: Customer reported improved steering response and the warning lights turned off after the repair.

Case Study 2: Wiring Repair on a 2016 GMC Sierra

Vehicle: 2016 GMC Sierra 1500, 50,000 miles

Problem: Driver experienced erratic steering and check engine light illumination.

Diagnosis: Diagnostic tests revealed the C0747 code, but further inspection showed damaged wiring to the steering sensor.

Solution: Repaired the damaged wiring and confirmed the correct operation of the steering angle sensor.

Cost: $180 (wiring repair: $80, labor: $100)

Result: After repair, the vehicle's handling returned to normal, and the check engine light remained off.

Diagnose C0747

Use GeekOBD APP for professional diagnosis!

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  • Step-by-step repair guidance
  • Professional-grade analysis
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Code Information

Code: C0747
System: Chassis (ABS, Steering, Suspension)
Severity: HIGH
Category: Chassis Codes