C077B - Understanding the Steering Angle Sensor Code in 2015-2020 Chevrolet Vehicles

Quick Answer

C077B means: C077B indicates a malfunction with the steering angle sensor, affecting vehicle stability.

Fix: Check and replace faulty components Cost: $200 - $400 Time: 90-180 minutes

Can I drive with C077B? Immediate attention is recommended to ensure safe vehicle operation.

Common Questions

What does C077B mean and how does it affect my car?

C077B indicates a problem with the steering angle sensor, which is crucial for the stability control system. If this code pops up, you may notice issues with steering responsiveness and potentially decreased vehicle control, especially in slippery conditions.

What are the most common causes of C077B and how much does it cost to fix?

The most common cause is a faulty steering angle sensor, with average repair costs ranging from $200 to $400. Additionally, wiring issues and software glitches can also trigger this code, requiring diagnostics that may cost around $100 to $200.

Can I drive my car with C077B or should I stop immediately?

While you may be able to drive the vehicle, it is not advisable to ignore the C077B code. Doing so could lead to compromised steering and stability, particularly in adverse conditions, which can result in dangerous situations.

How can I diagnose C077B myself using GeekOBD APP?

To diagnose C077B with the GeekOBD APP, start by connecting the app to your vehicle's OBD2 port. Run a full diagnostic scan to retrieve the code and any freeze frame data. Pay attention to the live data from the steering angle sensor to see if it remains consistent during turns.

What vehicles are most commonly affected by C077B?

C077B is frequently encountered in 2015-2020 Chevrolet models, including the Silverado, Equinox, and Malibu. If you own one of these vehicles, it's wise to be aware of this code and its implications.

How can I prevent C077B from happening again?

To prevent C077B from reoccurring, regularly inspect the steering components for wear and tear, ensure proper alignment, and keep the vehicle's software updated with the latest manufacturer releases.

What is C077B?

The diagnostic trouble code (DTC) C077B indicates an issue with the steering angle sensor in certain Chevrolet vehicles, particularly models from 2015 to 2020. This code is typically triggered when the vehicle's onboard diagnostics detect that the steering angle sensor is either out of range or fails to communicate properly with the vehicle's control module. The steering angle sensor is crucial for the stability control system, as it helps the vehicle understand the driver's intended direction and adjust the traction control accordingly. When this code appears, drivers may experience erratic handling, the stability control warning light illuminating, or even difficulty steering. It’s essential to address this issue promptly, as ignoring it may lead to safety concerns while driving, especially in adverse weather conditions where traction is paramount. The potential for decreased vehicle control can pose significant risks, making it crucial for car owners to understand what C077B means and how to address it.

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

Symptoms

Common symptoms when C077B is present:

  • The check engine light remains illuminated, indicating an underlying issue that requires attention.
  • Drivers may feel the steering wheel becoming stiff or unresponsive, especially during tight turns or maneuvers.
  • The vehicle's stability control system may deactivate, leading to a noticeable change in handling and traction.
  • In some cases, a malfunction message may display on the dashboard, alerting drivers to the steering system problem.
  • Unexpected steering corrections may occur, where the vehicle seems to steer itself, especially during highway driving.

Possible Causes

Most common causes of C077B (ordered by frequency):

  1. The most common cause of C077B is a faulty steering angle sensor, which has a likelihood of about 60%. This sensor may become misaligned or damaged due to wear and tear.
  2. Another possible cause is a wiring issue, such as damaged connectors or frayed wires, which can prevent proper communication between the sensor and the control module.
  3. Software glitches in the vehicle's electronic control unit (ECU) can also trigger this code. Regular updates from the manufacturer can help prevent these issues.
  4. Less commonly, a malfunctioning ABS module can cause C077B, affecting the sensor's operation and leading to stability control problems.
  5. In rare cases, issues with the steering column or even the steering rack can lead to the activation of this code.

C077B Repair Costs

Cost Breakdown by Repair Type

Steering Angle Sensor Replacement

Replacing the faulty steering angle sensor with an OEM part for reliable performance.

  • Total: $200 - $400
  • Success rate: 85%
Diagnostic and Repair Service

Comprehensive diagnostic service to identify root cause and perform necessary repairs.

  • Total: $100 - $200
  • Success rate: 90%
Money-Saving Tips for C077B
  • 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 C077B Diagnosis Process

Follow these systematic steps to accurately diagnose C077B. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Begin with a thorough visual inspection of the steering angle sensor and surrounding wiring for any obvious signs of damage or disconnection (5-10 minutes)

Step 1: Begin with a thorough visual inspection of the steering angle sensor and surrounding wiring for any obvious signs of damage or disconnection (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: Use the GeekOBD APP to perform an OBD2 scan, retrieving any additional codes and freeze frame data to better understand the context of the fault (10-15 minutes)

Step 2: Use the GeekOBD APP to perform an OBD2 scan, retrieving any additional codes and freeze frame data to better understand the context of the fault (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: Test the steering angle sensor using a multimeter or appropriate diagnostic tool to check its output and ensure it is functioning correctly (20-30 minutes)

Step 3: Test the steering angle sensor using a multimeter or appropriate diagnostic tool to check its output and ensure it is functioning correctly (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: Conduct a system function test to verify that the sensor operates within specified parameters after any adjustments or repairs (10-15 minutes)

Step 4: Conduct a system function test to verify that the sensor operates within specified parameters after any adjustments or repairs (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: Complete a road test under various driving conditions to confirm that the code does not return and the vehicle handles correctly (15-20 minutes)

Step 5: Complete a road test under various driving conditions to confirm that the code does not return and the vehicle handles 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 in 2018 Chevrolet Equinox

Vehicle: 2018 Chevrolet Equinox, 45,000 miles

Problem: Customer experienced a persistent check engine light and difficulty steering.

Diagnosis: Diagnostic scan revealed C077B, indicating a faulty steering angle sensor. Visual inspection confirmed misalignment.

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

Cost: $350 (including parts and labor)

Result: Customer reported improved steering response and the check engine light remained off.

Case Study 2: Wiring Repair for C077B in 2019 Chevrolet Silverado

Vehicle: 2019 Chevrolet Silverado, 30,000 miles

Problem: The vehicle showed C077B with a warning light, but the steering felt normal.

Diagnosis: Inspection found a damaged wiring harness connected to the steering angle sensor.

Solution: Repaired the wiring and tested the sensor output for accuracy.

Cost: $150 (for wiring repair and diagnostic service)

Result: C077B resolved, and the vehicle returned to normal operation.

Diagnose C077B

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: C077B
System: Chassis (ABS, Steering, Suspension)
Severity: HIGH
Category: Chassis Codes