C0371 - Steering Angle Sensor Malfunction in GM Vehicles

Quick Answer

C0371 means: C0371 indicates a malfunction in the steering angle sensor, affecting steering control and stability.

Fix: Check and replace faulty components Cost: $150 - $400 Time: 90-180 minutes

Can I drive with C0371? Address this issue immediately to ensure vehicle safety.

Common Questions

What does C0371 mean and how does it affect my car?

C0371 indicates a problem with the steering angle sensor, which can compromise your vehicle's handling and safety. Proper steering response is crucial for safe driving, especially in challenging conditions.

What are the most common causes of C0371 and how much does it cost to fix?

The most common cause is a faulty steering angle sensor, with repair costs typically ranging from $150 to $400. Other causes may include electrical issues or ECU faults, which can vary in cost.

Can I drive my car with C0371 or should I stop immediately?

It's advisable to avoid driving your vehicle until the issue is resolved, as it can affect steering control and safety, particularly in adverse conditions.

How can I diagnose C0371 myself using GeekOBD APP?

Using the GeekOBD APP, you can scan for trouble codes, view live data from the steering angle sensor, and analyze freeze frame data to understand the vehicle's condition.

What vehicles are most commonly affected by C0371?

Commonly affected vehicles include the 2010-2015 Chevrolet Equinox and the 2010-2016 GMC Terrain. Always check for any recalls or service bulletins related to your specific model.

How can I prevent C0371 from happening again?

Regular maintenance, including inspections of the steering system and electrical connections, can help prevent issues with the steering angle sensor. Keeping software updated can also mitigate problems.

What is C0371?

DTC C0371 is a diagnostic trouble code that indicates a malfunction in the steering angle sensor (SAS) of vehicles, particularly those manufactured by General Motors. The steering angle sensor plays a critical role in providing the vehicle's electronic stability control (ESC) system and power steering system with information about the position of the steering wheel. When this sensor fails, the vehicle may display erratic steering behavior, and the electronic stability control light may illuminate on the dashboard. This malfunction can lead to poor vehicle handling and increased risk of accidents, especially in slippery conditions. It is crucial to address this issue promptly, as it can affect the overall safety and drivability of your vehicle. Commonly affected models include the 2010-2015 Chevrolet Equinox and the 2010-2016 GMC Terrain, among others. If left unresolved, this code can lead to further complications and costly repairs down the line, making it essential to understand the implications of DTC C0371 and seek appropriate diagnostics and repairs.

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

Symptoms

Common symptoms when C0371 is present:

  • The check engine light or stability control light stays on constantly, indicating a potential issue with the steering angle sensor.
  • Drivers may experience a noticeable delay or erratic behavior when steering, leading to a feeling of instability while driving, especially during turns.
  • Fuel economy may decrease by 5-10% due to the increased effort required for steering adjustments, as the power steering system may not function optimally.
  • The vehicle may have difficulty straightening out after turns, which can be particularly dangerous on highways or in adverse weather conditions.
  • In some cases, the steering feels unusually heavy or requires more effort than usual, indicating a malfunction in the steering assist system.

Possible Causes

Most common causes of C0371 (ordered by frequency):

  1. A faulty steering angle sensor is the most common cause, accounting for approximately 70% of C0371 occurrences. This can arise from wear and tear or electrical issues.
  2. Electrical connections or wiring issues, such as short circuits or corrosion, can also lead to this code appearing. These issues can often be prevented by regular inspections.
  3. Another possible cause is the failure of the vehicle's electronic control unit (ECU), which processes the sensor data. This is less common but can significantly affect vehicle performance.
  4. Improper alignment or suspension issues can also indirectly cause the steering angle sensor to malfunction, leading to this DTC. Regular maintenance can help prevent such issues.
  5. Rarely, this code may appear due to software glitches in the vehicle's onboard computer systems, highlighting the importance of keeping software updated.

C0371 Repair Costs

Cost Breakdown by Repair Type

Steering Angle Sensor Replacement

Replacing the faulty steering angle sensor with a new unit. This is the most common repair for DTC C0371.

  • Total: $150 - $400
  • Success rate: 90%
Electrical Repair

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

  • Total: $100 - $250
  • Success rate: 80%
ECU Reprogramming

In cases where the ECU needs reprogramming, this service may be necessary to ensure proper sensor functionality.

  • Total: $75 - $150
  • Success rate: 70%
Money-Saving Tips for C0371
  • 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 C0371 Diagnosis Process

Follow these systematic steps to accurately diagnose C0371. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Initial visual inspection - Begin by checking for obvious signs such as damaged wiring, loose connections, or corrosion around the steering angle sensor and associated components (5-10 minutes)

Step 1: Initial visual inspection - Begin by checking for obvious signs such as damaged wiring, loose connections, or corrosion around the steering angle sensor and associated components (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 - Use the GeekOBD APP to retrieve all diagnostic trouble codes and view freeze frame data to better understand the context of the fault (10-15 minutes)

Step 2: OBD2 scan with GeekOBD APP - Use the GeekOBD APP to retrieve all diagnostic trouble codes and view 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: Component testing - Utilize a multimeter to test the steering angle sensor and its electrical connections for proper voltage and continuity (20-30 minutes)

Step 3: Component testing - Utilize a multimeter to test the steering angle sensor and its electrical connections for proper voltage and continuity (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 making any repairs, verify the proper operation of the steering angle sensor and clear any stored codes (10-15 minutes)

Step 4: System function test - After making any repairs, verify the proper operation of the steering angle sensor and clear any stored codes (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 was successful and that the steering feels stable (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to confirm the repair was successful and that the steering feels stable (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 2014 Chevrolet Equinox

Vehicle: 2014 Chevrolet Equinox, 80,000 miles

Problem: Customer reported that the stability control light was illuminated and steering felt erratic.

Diagnosis: After scanning for codes, C0371 was confirmed. A visual inspection revealed corrosion on the sensor connector.

Solution: Replaced the steering angle sensor and cleaned the electrical connections.

Cost: $350 (includes parts and labor)

Result: Customer reported improved steering response and the stability control light remained off after repairs.

Case Study 2: Electrical Issue in a 2015 GMC Terrain

Vehicle: 2015 GMC Terrain, 60,000 miles

Problem: Customer experienced heavy steering and stability control light on dashboard.

Diagnosis: DTC C0371 was retrieved, and further inspection revealed a damaged wiring harness affecting the sensor.

Solution: Replaced the damaged wiring and reconnected all electrical components.

Cost: $200 (parts and labor)

Result: Steering returned to normal function, and the warning light was cleared.

Diagnose C0371

Use GeekOBD APP for professional diagnosis!

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  • Professional-grade analysis
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Code Information

Code: C0371
System: Chassis (ABS, Steering, Suspension)
Severity: HIGH
Category: Chassis Codes