C0629 - Understanding the Steering Angle Sensor Fault in Vehicles Like Chevrolet and GMC

Quick Answer

C0629 means: C0629 indicates a fault with the steering angle sensor, affecting vehicle stability.

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

Can I drive with C0629? It's crucial to address this issue immediately to ensure safe vehicle operation.

Common Questions

What does C0629 mean and how does it affect my car?

The C0629 code indicates an issue with your vehicle's steering angle sensor, which is crucial for ensuring proper handling and safety. If the sensor is faulty, it can lead to erratic steering and compromised stability control, making your car harder to control, especially in slippery conditions.

What are the most common causes of C0629 and how much does it cost to fix?

Common causes of C0629 include a faulty steering angle sensor, damaged wiring, or software issues. Repair costs can range from $50 for simple wiring repairs to $300 for sensor replacement, depending on the severity of the problem and labor costs in your area.

Can I drive my car with C0629 or should I stop immediately?

While you can technically drive your vehicle with a C0629 code, it's not advisable. The issues related to the steering angle sensor can lead to decreased vehicle control, especially during emergency maneuvers. It's best to have the issue diagnosed and repaired as soon as possible to ensure your safety.

How can I diagnose C0629 myself using GeekOBD APP?

To diagnose C0629 using the GeekOBD APP, first connect the app to your vehicle's OBD2 port. Run a diagnostic scan to retrieve the error code. Use the freeze frame data to understand when the fault occurred and check for any other related codes that may give further insights into the issue.

What vehicles are most commonly affected by C0629?

C0629 is often found in various Chevrolet and GMC models from 2010 to 2018, including the Chevrolet Silverado, GMC Sierra, and Chevrolet Equinox. If you own one of these vehicles, be aware of the symptoms and get any issues checked promptly.

How can I prevent C0629 from happening again?

Prevent C0629 by regularly inspecting your vehicle's wiring and connections, ensuring that the steering angle sensor is calibrated correctly during routine maintenance, and addressing any warning lights or symptoms immediately to prevent further damage.

What is C0629?

The diagnostic trouble code (DTC) C0629 indicates a problem with the steering angle sensor, which is crucial for the stability and handling of your vehicle. This sensor is responsible for measuring the angle of the steering wheel, allowing the vehicle's computer system to determine the position and direction of the steering. When the C0629 code is triggered, it typically means that there is a fault in either the sensor itself or the wiring connected to it. This can lead to issues with your vehicle's stability control and traction control systems, which may compromise safety during driving. In practical terms, a malfunctioning steering angle sensor can result in erratic steering behavior, increased wear on components, and a potential failure of the vehicle's electronic stability control (ESC). The code is commonly seen in various makes and models, particularly in Chevrolet and GMC vehicles from 2010 to 2018. If left unattended, this can lead to more significant problems, including poor handling characteristics and increased risk of accidents during adverse driving conditions. Therefore, addressing a C0629 code promptly is essential for maintaining vehicle safety and performance.

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

Symptoms

Common symptoms when C0629 is present:

  • The check engine light may stay illuminated, indicating a persistent issue with the steering angle sensor.
  • Drivers may experience unresponsive or erratic steering, making it difficult to maintain control of the vehicle.
  • Fuel economy may decrease by 10-15% due to the malfunctioning sensor affecting engine performance.
  • In some cases, vehicles may exhibit problems with traction control and stability control systems, leading to a lack of control in slippery conditions.
  • A noticeable increase in steering effort could occur, particularly during low-speed maneuvers or parking.

Possible Causes

Most common causes of C0629 (ordered by frequency):

  1. The most common cause of C0629 is a faulty steering angle sensor, with a likelihood of about 60%. This could be due to wear and tear, impacting its accuracy.
  2. A second common cause is damaged wiring or poor connections, which can lead to intermittent signals being sent to the powertrain control module (PCM).
  3. A third possibility is software issues in the vehicle's control module, which can usually be resolved through a software update.
  4. Less common but serious could be a failure in the power steering system, which may require significant repairs.
  5. A rare cause includes contamination or moisture affecting the sensor's performance, often requiring sensor replacement.

C0629 Repair Costs

Cost Breakdown by Repair Type

Steering Angle Sensor Replacement

Replacing the faulty steering angle sensor with a new unit.

  • Total: $150 - $300
  • Success rate: 85%
Wiring Repair

Repairing or replacing damaged wiring and connectors.

  • Total: $50 - $150
  • Success rate: 75%
Money-Saving Tips for C0629
  • 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 C0629 Diagnosis Process

Follow these systematic steps to accurately diagnose C0629. 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).

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 (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).

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 specific diagnostic tools to test the steering angle sensor and related components (20-30 minutes)

Step 3: Component testing - Use a multimeter or specific diagnostic tools to test the steering angle sensor and related components (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 after repairs and clear codes using the GeekOBD APP (10-15 minutes)

Step 4: System function test - Verify proper operation after repairs and clear codes using the GeekOBD APP (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 repair success (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success (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 2015 Chevy Silverado

Vehicle: 2015 Chevrolet Silverado, 45,000 miles

Problem: Customer reported that the stability control warning light was on and the steering felt loose.

Diagnosis: Upon inspection, the diagnostic code C0629 was retrieved, confirming a faulty steering angle sensor.

Solution: Replaced the steering angle sensor and recalibrated the system using the GeekOBD APP.

Cost: $220 (sensor: $150, labor: $70)

Result: The customer reported normal steering response and no further warning lights after the repair.

Case Study 2: Wiring Repair on 2013 GMC Terrain

Vehicle: 2013 GMC Terrain, 70,000 miles

Problem: Driver experienced intermittent steering issues and traction control warnings.

Diagnosis: Diagnostic scan revealed C0629, and visual inspection showed frayed wiring to the steering angle sensor.

Solution: Repaired the damaged wiring and ensured all connections were secure.

Cost: $100 (wiring repair: $50, labor: $50)

Result: The vehicle operated normally post-repair, with no further issues reported.

Diagnose C0629

Use GeekOBD APP for professional diagnosis!

  • Real-time data monitoring
  • Advanced diagnostic features
  • Step-by-step repair guidance
  • Professional-grade analysis
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Code Information

Code: C0629
System: Chassis (ABS, Steering, Suspension)
Severity: HIGH
Category: Chassis Codes