C087B - Understanding the Steering Angle Sensor Fault in Chevrolet, GMC, and Cadillac Models

Quick Answer

C087B means: C087B indicates a fault with the steering angle sensor, affecting stability control.

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

Can I drive with C087B? Immediate attention is recommended to ensure safe vehicle operation.

Common Questions

What does C087B mean and how does it affect my car?

The C087B code indicates an issue with the steering angle sensor, which is crucial for your vehicle's stability control systems. If this sensor isn't functioning correctly, it can lead to dangerously poor handling and responsiveness, especially in challenging driving conditions.

What are the most common causes of C087B and how much does it cost to fix?

Common causes include a faulty steering angle sensor, wiring issues, and software glitches. Repair costs can range from $150 to $300 for sensor replacement, while wiring repairs might cost between $100 and $200.

Can I drive my car with C087B or should I stop immediately?

While you can technically drive with a C087B code, it is not advised due to potential safety risks. The vehicle may exhibit handling problems that could lead to accidents, so it’s best to have it diagnosed and repaired as soon as possible.

How can I diagnose C087B myself using GeekOBD APP?

Using the GeekOBD APP, you can perform a full OBD2 scan to retrieve the C087B code. Check the freeze frame data to identify when the code was triggered and assess any additional codes that might provide context to the issue.

What vehicles are most commonly affected by C087B?

The C087B code is frequently seen in 2015-2020 Chevrolet, GMC, and Cadillac models. Owners should regularly check for software updates and recalls that may pertain to stability control systems.

How can I prevent C087B from happening again?

To prevent recurrence, ensure regular inspections of your vehicle's electrical systems, keep the steering system well-maintained, and always check for software updates that could enhance system performance.

What is C087B?

The diagnostic trouble code (DTC) C087B indicates a malfunction related to the steering angle sensor, commonly found in vehicles manufactured by General Motors, including Chevrolet, GMC, and Cadillac models from around 2015 to 2020. This code signifies that the vehicle's electronic stability control (ESC) system has detected an issue with the steering angle sensor's performance. The steering angle sensor plays a crucial role in ensuring safe handling by providing real-time data about the steering wheel's position and movement. When the sensor fails or produces inaccurate readings, it can lead to compromised vehicle stability and control, especially during cornering or adverse weather conditions. Drivers may notice symptoms like the traction control light illuminating on the dashboard or an unexpected loss of steering responsiveness. Ignoring this code can result in decreased safety, affecting features such as anti-lock braking systems (ABS) and electronic stability programs (ESP). Therefore, addressing the C087B code promptly is essential for maintaining vehicle performance and safety.

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

Symptoms

Common symptoms when C087B is present:

  • The traction control light illuminates continuously, indicating a possible malfunction within the steering system.
  • Drivers may experience a lack of steering response, making it difficult to steer during turns or maneuvers, which can feel unsettling and unsafe.
  • The car may exhibit erratic handling, such as pulling to one side, particularly during acceleration or braking, which can affect overall driving safety.
  • Unusual noises may be heard from the steering column, especially when turning the wheel, indicating potential sensor or wiring issues.
  • In some instances, the vehicle may enter limp mode, limiting speed and power to prevent further damage until the problem is resolved.

Possible Causes

Most common causes of C087B (ordered by frequency):

  1. The most common cause of the C087B code is a faulty steering angle sensor, which can account for approximately 60% of cases due to wear and tear over time.
  2. Electrical issues such as damaged wiring harnesses or poor connections can lead to inaccurate sensor readings, often seen in older vehicles or those exposed to harsh conditions.
  3. Software glitches or calibration issues with the ESC system may also trigger this code; regular updates can help prevent these problems.
  4. Less common but serious causes include a malfunctioning Electronic Control Unit (ECU) that fails to interpret sensor data correctly, which can be critical for vehicles equipped with advanced safety features.
  5. Rarely, physical damage to the steering column or related components may disrupt sensor function, particularly in vehicles that have been involved in accidents.

C087B Repair Costs

Cost Breakdown by Repair Type

Steering Angle Sensor Replacement

Replacing the faulty steering angle sensor to restore proper functionality.

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

Repairing or replacing damaged wiring or connectors that can cause sensor malfunctions.

  • Total: $100 - $200
  • Success rate: 75%
ECU Software Update

Updating the vehicle's ECU software to eliminate potential calibration issues.

  • Total: $50 - $100
  • Success rate: 70%
Money-Saving Tips for C087B
  • 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 C087B Diagnosis Process

Follow these systematic steps to accurately diagnose C087B. Each step builds on the previous one to ensure accurate diagnosis.

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

Step 1: Initial visual inspection - Check for damaged wiring, loose connections, or corrosion in the steering angle sensor circuit (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 diagnostic codes and freeze frame data to understand the fault context, which helps in identifying related issues (10-15 minutes)

Step 2: OBD2 scan with GeekOBD APP - Retrieve all diagnostic codes and freeze frame data to understand the fault context, which helps in identifying related issues (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 to measure voltage and resistance at the steering angle sensor, ensuring it meets manufacturer specifications (20-30 minutes)

Step 3: Component testing - Use a multimeter to measure voltage and resistance at the steering angle sensor, ensuring it meets manufacturer specifications (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 - After repairs, verify the operation of the steering angle sensor and clear codes using the GeekOBD APP (10-15 minutes)

Step 4: System function test - After repairs, verify the operation of the steering angle sensor 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 the repair success and monitor for any recurring symptoms (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to confirm the repair success and monitor for any recurring symptoms (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 2017 Chevrolet Equinox

Vehicle: 2017 Chevrolet Equinox, 45,000 miles

Problem: The vehicle's traction control light was illuminated, and the driver experienced poor steering responsiveness.

Diagnosis: A scan revealed the C087B code, indicating an issue with the steering angle sensor. Visual inspection showed the sensor was damaged.

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

Cost: $250 (including parts and labor)

Result: Post-repair, the traction control light turned off, and steering responsiveness improved significantly.

Case Study 2: Wiring Repair on a 2016 GMC Terrain

Vehicle: 2016 GMC Terrain, 60,000 miles

Problem: The driver reported steering difficulties and the traction control light was on.

Diagnosis: OBD2 scan showed C087B. Further inspection revealed frayed wiring near the steering column.

Solution: Repaired the damaged wiring and secured connections, ensuring proper communication with the steering angle sensor.

Cost: $150 (parts and labor included)

Result: After the repair, the vehicle's handling returned to normal, and the warning light was cleared.

Diagnose C087B

Use GeekOBD APP for professional diagnosis!

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  • Professional-grade analysis
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Code Information

Code: C087B
System: Chassis (ABS, Steering, Suspension)
Severity: HIGH
Category: Chassis Codes