C059A - Understanding the Code and Its Impact on 2015-2018 Chevrolet Silverado

Quick Answer

C059A means: C059A signifies a malfunction in the steering angle sensor, affecting vehicle stability and safety.

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

Can I drive with C059A? Address this issue promptly to ensure safe vehicle operation.

Common Questions

What does C059A mean and how does it affect my car?

The C059A code indicates an issue with your vehicle's steering angle sensor, which is essential for stability control. If this sensor fails, you may experience loose steering, unresponsive handling, and the potential for the stability control system to deactivate, compromising your safety on the road.

What are the most common causes of C059A and how much does it cost to fix?

The most common causes of the C059A code include a faulty steering angle sensor (about 60% of cases) and wiring issues (approximately 25%). Repair costs can range from $150 to $300 for sensor replacement, with additional costs for wiring repairs or calibration services.

Can I drive my car with C059A or should I stop immediately?

Driving with the C059A code present is not recommended. Since it can affect your vehicle's handling and safety features, it's wise to address this issue as soon as possible to prevent accidents or further damage.

How can I diagnose C059A myself using GeekOBD APP?

To diagnose C059A using the GeekOBD APP, connect the app to your vehicle's OBD2 port. Run a full scan to retrieve the code and any related trouble codes. Check the freeze frame data for insight into the conditions when the code was triggered, and follow up with visual inspections of the steering system.

What vehicles are most commonly affected by C059A?

The C059A code frequently affects Chevrolet Silverado and GMC Sierra models from 2015 to 2018, but it can also appear in other GM vehicles with similar steering systems. Always check for recalls or technical service bulletins (TSBs) related to your specific model.

How can I prevent C059A from happening again?

To prevent C059A from recurring, ensure regular maintenance checks for your vehicle's steering system. Keep the steering components clean and free from corrosion, and if you have repairs done, always verify that sensors are calibrated properly afterward.

What is C059A?

The DTC C059A code indicates an issue with the steering angle sensor in vehicles, particularly those from Chevrolet and GMC, such as the 2015-2018 Silverado and Sierra models. This code is triggered when the Vehicle Control Module (VCM) detects a malfunction in the steering sensor's performance. The steering angle sensor is crucial for the vehicle's stability control system, which helps maintain traction and control while driving. When this sensor fails, it can lead to reduced steering response, erratic handling, and potential safety concerns, especially during adverse weather conditions or emergency maneuvers. Additionally, the check engine light will likely illuminate, signaling that the driver should take action. Ignoring this code can result in further damage to the vehicle's steering system, increasing repair costs and compromising safety. Regular diagnostics, especially if you use tools like the GeekOBD APP, can help identify and resolve these issues before they escalate.

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

Symptoms

Common symptoms when C059A is present:

  • The check engine light is illuminated, indicating a need for immediate attention.
  • Steering feels loose or unresponsive, making it difficult to control the vehicle effectively.
  • The vehicle's stability control system may deactivate, leading to compromised safety.
  • Erratic steering feedback while turning, which can be alarming during high-speed maneuvers.
  • Unusual noises from the steering column when turning, suggesting potential mechanical failure.

Possible Causes

Most common causes of C059A (ordered by frequency):

  1. Faulty steering angle sensor - Approximately 60% of cases can be traced back to a defective sensor that fails to send accurate readings to the VCM.
  2. Wiring issues - Damaged or corroded wires leading to the sensor can impede performance, accounting for about 25% of occurrences.
  3. Calibration problems - Incorrect sensor calibration after repairs can lead to this code, highlighting the importance of proper setup after component replacements.
  4. Software glitches - Rarely, a software issue within the VCM can trigger the C059A code, necessitating a software update.
  5. Mechanical failure - In some cases, physical damage to the steering mechanism can also lead to this code, though it's less common.

C059A Repair Costs

Cost Breakdown by Repair Type

Steering Angle Sensor Replacement

Replacing the faulty steering angle sensor with an OEM part.

  • Total: $150 - $300
  • Success rate: 95%
Wiring Repair

Repairing damaged wiring and connectors related to the steering angle sensor.

  • Total: $100 - $200
  • Success rate: 85%
Calibration Service

Recalibrating the steering angle sensor after replacement.

  • Total: $50 - $100
  • Success rate: 90%
Money-Saving Tips for C059A
  • 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 C059A Diagnosis Process

Follow these systematic steps to accurately diagnose C059A. 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 relevant wiring (20-30 minutes)

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

Step 4: System function test - Verify proper operation of the steering system after repairs and clear codes with 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 and ensure stability control functions as intended (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and ensure stability control functions as intended (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 a 2016 Chevrolet Silverado

Vehicle: 2016 Chevrolet Silverado 1500, 65,000 miles

Problem: Customer reported the check engine light was on, and the vehicle felt unstable during turns.

Diagnosis: A scan revealed the C059A code, and a visual inspection identified a faulty steering angle sensor.

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

Cost: $280 (sensor: $200, labor: $80)

Result: The customer reported improved stability and no further warning lights.

Case Study 2: Wiring Issues in a 2017 GMC Sierra

Vehicle: 2017 GMC Sierra 1500, 50,000 miles

Problem: Driver experienced sporadic steering feedback and a persistent C059A code.

Diagnosis: Diagnostics revealed corroded wiring leading to the steering angle sensor.

Solution: Repaired the wiring and replaced connectors as necessary.

Cost: $150 (labor: $100, parts: $50)

Result: Post-repair, the steering function was restored, and the issue was resolved.

Diagnose C059A

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: C059A
System: Chassis (ABS, Steering, Suspension)
Severity: HIGH
Category: Chassis Codes