C0663 - Understanding the Steering Angle Sensor Code for Chevy, GMC, and Cadillac Models

Quick Answer

C0663 means: C0663 indicates a problem with the steering angle sensor, which can affect vehicle safety.

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

Can I drive with C0663? Immediate inspection is recommended to ensure safe driving.

Common Questions

What does C0663 mean and how does it affect my car?

DTC C0663 indicates a problem with the steering angle sensor, which is essential for vehicle stability control. If this sensor fails, it can lead to unpredictable steering behavior and may compromise your vehicle's safety features.

What are the most common causes of C0663 and how much does it cost to fix?

The primary cause of DTC C0663 is a faulty steering angle sensor, which typically requires replacement and can cost between $150 and $400. Other causes may include damaged wiring or calibration issues, which can be less expensive to repair.

Can I drive my car with C0663 or should I stop immediately?

While you may still be able to drive your vehicle, it is not recommended to ignore the C0663 code. The safety features related to steering and stability may not function correctly, so seeking immediate inspection is crucial.

How can I diagnose C0663 myself using GeekOBD APP?

Using the GeekOBD APP, you can perform an OBD2 scan to retrieve the C0663 code and any related codes. Check the freeze frame data for context on when the code triggered, and use the app's diagnostic features to test the steering angle sensor.

What vehicles are most commonly affected by C0663?

DTC C0663 is frequently reported in Chevrolet, GMC, and Cadillac models, especially in vehicles manufactured between 2010 and 2018. Owners of these models should be vigilant for symptoms associated with this code.

How can I prevent C0663 from happening again?

Regular maintenance, including checking the integrity of wiring and connectors related to the steering system, can help prevent the recurrence of C0663. Additionally, ensuring proper calibration after any steering component replacement is crucial.

What is C0663?

DTC C0663 refers to a diagnostic trouble code indicating an issue with the steering angle sensor, commonly found in vehicles from manufacturers like Chevrolet, GMC, and Cadillac. This sensor plays a critical role in ensuring that the vehicle's stability control systems function properly. The steering angle sensor measures the position of the steering wheel and sends this information to the vehicle's computer system. If the sensor malfunctions, the vehicle may experience issues such as an incorrect steering feel, erratic behavior of the traction control system, or the illumination of warning lights on the dashboard. It's essential to address this issue promptly, as it can affect the vehicle’s handling and safety. Over time, drivers may notice symptoms like inconsistent steering response or the steering wheel being off-center. Ignoring this code could lead to more significant problems, including increased wear on suspension components or failure of stability control systems. For a typical driver, it’s advisable to seek a professional diagnosis as soon as the C0663 code is triggered to prevent further complications and ensure safe driving conditions.

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

Symptoms

Common symptoms when C0663 is present:

  • The check engine light remains illuminated, indicating the vehicle's computer has detected a fault.
  • Steering may feel loose or unresponsive, affecting the driver's control during turns.
  • The traction control or stability control warning lights may flash intermittently, signaling potential safety issues.
  • The steering wheel may be misaligned, causing the vehicle to drift unexpectedly while driving straight.
  • Unexpected changes in vehicle handling, especially during sharp turns or sudden stops.

Possible Causes

Most common causes of C0663 (ordered by frequency):

  1. The most common cause of C0663 is a faulty steering angle sensor, occurring in about 65% of cases. This can often be due to wear and tear or electrical issues.
  2. Another frequent cause is damaged wiring or poor electrical connections within the sensor circuit, which may account for approximately 20% of instances.
  3. A third cause could be calibration issues after a steering wheel replacement, which can be prevented by following proper installation protocols.
  4. Less commonly, a malfunctioning power steering module can contribute to this code, though this is a more complex issue.
  5. In rare cases, software glitches in the vehicle's onboard computer systems can result in the C0663 code being triggered.

C0663 Repair Costs

Cost Breakdown by Repair Type

Steering Angle Sensor Replacement

Replacing the faulty steering angle sensor with an OEM part.

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

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

  • Total: $50 - $150
  • Success rate: 80%
Money-Saving Tips for C0663
  • 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 C0663 Diagnosis Process

Follow these systematic steps to accurately diagnose C0663. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Conduct an initial visual inspection of the steering system, looking for damaged wiring, loose connectors, or signs of corrosion (5-10 minutes)

Step 1: Conduct an initial visual inspection of the steering system, looking for damaged wiring, loose connectors, or signs of 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: Use the GeekOBD APP to perform an OBD2 scan, retrieving all codes and freeze frame data to understand the fault context better (10-15 minutes)

Step 2: Use the GeekOBD APP to perform an OBD2 scan, retrieving all codes and freeze frame data to understand the fault context better (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 with a multimeter or a dedicated diagnostic tool to check for proper voltage and operational parameters (20-30 minutes)

Step 3: Test the steering angle sensor with a multimeter or a dedicated diagnostic tool to check for proper voltage and operational parameters (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: If repairs are made, perform a system function test to verify the proper operation of the steering angle sensor and clear any stored codes (10-15 minutes)

Step 4: If repairs are made, perform a system function test to 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: Conduct a road test under various driving conditions to confirm the issue has been resolved and that the vehicle handles correctly (15-20 minutes)

Step 5: Conduct a road test under various driving conditions to confirm the issue has been resolved and that 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 on a 2015 Chevy Tahoe

Vehicle: 2015 Chevrolet Tahoe, 75,000 miles

Problem: Customer reported the check engine light was on, and steering felt loose.

Diagnosis: The GeekOBD APP revealed the C0663 code, indicating a faulty steering angle sensor. A visual inspection confirmed the sensor was damaged.

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

Cost: $250 (sensor: $200, labor: $50)

Result: The check engine light was cleared, and the steering response returned to normal during a follow-up road test.

Case Study 2: Wiring Repair on a 2017 GMC Sierra

Vehicle: 2017 GMC Sierra, 60,000 miles

Problem: Customer experienced intermittent traction control warning lights and felt steering was off-center.

Diagnosis: DTC C0663 was found; inspection revealed damaged wiring near the steering column.

Solution: Wiring was repaired and reconnected; the system was tested with the GeekOBD APP to ensure proper function.

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

Result: All warning lights were cleared, and steering alignment was restored, ensuring safe operation.

Diagnose C0663

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: C0663
System: Chassis (ABS, Steering, Suspension)
Severity: HIGH
Category: Chassis Codes