Quick Answer
C087A means: C087A indicates a malfunction in the steering angle sensor circuit.
Can I drive with C087A? Immediate attention is recommended to ensure safe vehicle operation.
Common Questions
What does C087A mean and how does it affect my car?
The C087A code signals a problem with the steering angle sensor, which is crucial for stability and traction control systems. If this code appears, you may notice steering issues or illumination of the check engine light, potentially leading to unsafe vehicle handling.
What are the most common causes of C087A and how much does it cost to fix?
The primary cause of the C087A code is a faulty steering angle sensor, estimated to cost between $150 and $300 for replacement. Other causes include damaged wiring or improper installations, which may incur lower costs depending on the specific repair needed.
Can I drive my car with C087A or should I stop immediately?
Driving with a C087A code is not advisable. The malfunction can impair your vehicle's handling and stability, particularly in adverse conditions. It's best to address this code as soon as possible to ensure safe driving.
How can I diagnose C087A myself using GeekOBD APP?
To diagnose the C087A code using the GeekOBD APP, start by scanning for codes and reviewing freeze frame data. Next, check the live data from the steering angle sensor to see if readings are within the expected range, and look for any anomalies that might indicate a fault.
What vehicles are most commonly affected by C087A?
The C087A code is frequently reported in vehicles like the 2015-2020 Chevrolet Silverado and GMC Sierra, along with other GM models from the same production years. Check local recalls or Technical Service Bulletins (TSBs) that might pertain to this issue.
How can I prevent C087A from happening again?
To prevent the C087A code from recurring, ensure regular maintenance on your vehicle's steering system, including checking for loose connections and ensuring proper installation of aftermarket parts. Additionally, avoid exposing the steering components to excessive moisture or debris.
What is C087A?
The C087A trouble code is a specific diagnostic trouble code (DTC) indicating a problem with the vehicle's steering angle sensor or the associated circuit. This code is commonly encountered in models such as the 2015-2020 Chevrolet Silverado and GMC Sierra. When your vehicle's onboard computer detects that the steering angle sensor is out of the expected range or is malfunctioning, it triggers the C087A code. This sensor plays a critical role in various vehicle systems, including stability control and traction control. A malfunction can lead to incorrect readings, which may affect your vehicle's handling and safety features. If left unaddressed, the C087A code can result in diminished vehicle performance, such as difficulty steering or increased wear on steering components. Additionally, it can lead to the illumination of the check engine light, which may prompt you to seek diagnostic assistance. Addressing the C087A code promptly is essential for maintaining the safety and functionality of your vehicle, especially under challenging driving conditions.
System: C - Chassis (ABS, Steering, Suspension)
Symptoms
Common symptoms when C087A is present:
- Check engine light stays illuminated, indicating a fault that needs attention.
- Steering feels unstable or unresponsive, particularly during sharp turns or sudden maneuvers.
- Traction control and stability control systems may be disabled, affecting vehicle handling in adverse conditions.
- Increased wear on tires and steering components due to misalignment caused by sensor issues.
- Difficulty calibrating the steering angle sensor, leading to further complications in the vehicle's electronic systems.
Possible Causes
Most common causes of C087A (ordered by frequency):
- The most common cause of the C087A code is a faulty steering angle sensor, which is likely to occur in about 60% of cases. This component can wear out over time or become misaligned, leading to inaccurate readings.
- Another cause can be damaged wiring or connectors in the steering angle sensor circuit. This could arise from wear and tear or exposure to harsh environmental conditions, accounting for 25% of the cases.
- Improper installation of aftermarket steering components can lead to sensor misalignment, which is a preventable issue that can be avoided with correct installations.
- Less commonly, a malfunctioning Electronic Control Module (ECM) might misinterpret sensor signals, which can lead to a C087A code but is relatively rare.
- Lastly, issues with the vehicle’s power supply, such as a weak battery or faulty alternator, can lead to sensor failures, although this is a less frequent cause.
C087A Repair Costs
Cost Breakdown by Repair Type
Steering Angle Sensor Replacement
Replacing the steering angle sensor is typically the most effective solution for a C087A code. This part is crucial for accurate steering feedback.
- Total: $150 - $300
- Success rate: 90%
Wiring Repair
Repairing damaged wiring or connectors can resolve the C087A code if the sensor itself is functioning correctly.
- Total: $100 - $200
- Success rate: 75%
Money-Saving Tips for C087A
- 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 C087A Diagnosis Process
Follow these systematic steps to accurately diagnose C087A. 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). Look specifically at the connectors near the steering column.
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). This will help you see if other codes are present that might relate to the issue.
Step 3: Step 3: Component testing - Use a multimeter or the GeekOBD APP to test the steering angle sensor and its circuit for continuity and proper voltage (20-30 minutes)
Step 3: Component testing - Use a multimeter or the GeekOBD APP to test the steering angle sensor and its circuit for continuity and proper voltage (20-30 minutes). Make sure to compare readings against manufacturer specifications.
Step 4: Step 4: System function test - After repairs, verify proper operation of the steering systems and clear codes using the GeekOBD APP (10-15 minutes)
Step 4: System function test - After repairs, verify proper operation of the steering systems and clear codes using the GeekOBD APP (10-15 minutes). Ensure the steering angle sensor is calibrated properly.
Step 5: Step 5: Road test verification - Drive the vehicle under various conditions to confirm the repair success and monitor if any warning lights reappear (15-20 minutes)
Step 5: Road test verification - Drive the vehicle under various conditions to confirm the repair success and monitor if any 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 in 2017 Chevrolet Silverado
Vehicle: 2017 Chevrolet Silverado, 45,000 miles
Problem: Customer reported a check engine light and unstable steering.
Diagnosis: Diagnostic scan revealed C087A trouble code. Visual inspection showed a faulty steering angle sensor.
Solution: Replaced the steering angle sensor and recalibrated the system using the GeekOBD APP.
Cost: $250 (sensor $200, labor $50)
Result: After replacement, the check engine light was cleared and the steering function returned to normal.
Case Study 2: Wiring Repair for C087A in 2018 GMC Sierra
Vehicle: 2018 GMC Sierra, 30,000 miles
Problem: Vehicle displayed a C087A code with no apparent symptoms.
Diagnosis: OBD2 scan confirmed C087A; further inspection revealed damaged wiring near the sensor.
Solution: Repaired the damaged wiring and ensured all connections were secure.
Cost: $150 (labor $100, materials $50)
Result: C087A code cleared and no further issues were reported after the repair.