C0669 - Understanding and Fixing C0669 in 2015-2018 Chevy Silverado and GMC Sierra

Quick Answer

C0669 means: C0669 indicates a problem with the steering angle sensor circuit.

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

Can I drive with C0669? Immediate inspection is recommended to ensure safe vehicle operation.

Common Questions

What does C0669 mean and how does it affect my car?

C0669 indicates a problem with the steering angle sensor circuit, which can lead to steering instability and safety concerns. If left unresolved, it may affect the performance of other systems like traction control and stability control, increasing the risk of losing control of the vehicle.

What are the most common causes of C0669 and how much does it cost to fix?

The most frequent causes of C0669 include a faulty steering angle sensor, damaged wiring, or poor electrical connections. Repair costs can range from $100 to $300, depending on the specific issue and whether parts need replacing.

Can I drive my car with C0669 or should I stop immediately?

While you may still be able to drive, it is not advisable to ignore the C0669 code. Erratic steering can pose safety risks, and it is best to have your vehicle inspected by a professional mechanic as soon as possible.

How can I diagnose C0669 myself using GeekOBD APP?

To diagnose C0669 using the GeekOBD APP, connect the app to your vehicle's OBD2 port, run a diagnostic scan, and review the codes displayed. Look for any freeze frame data related to the steering angle sensor to help pinpoint the issue.

What vehicles are most commonly affected by C0669?

The C0669 code is commonly found in 2015-2018 Chevrolet Silverado and GMC Sierra models. There may also be related issues in other GM vehicles from the same production years.

How can I prevent C0669 from happening again?

Regular vehicle maintenance, including inspections of the steering system and electrical connections, can help prevent C0669 from recurring. Keeping the steering column clean and dry helps avoid corrosion, while timely repairs of any electrical issues are also important.

What is C0669?

The DTC code C0669 is a diagnostic trouble code that indicates an issue with the steering angle sensor circuit. This code often arises in vehicles like the 2015-2018 Chevrolet Silverado and GMC Sierra, where the steering angle sensor plays a crucial role in ensuring the vehicle's stability and safety. This sensor measures the angle of the steering wheel and communicates that information to the vehicle's electronic control unit (ECU). When the C0669 code triggers, it usually means there is a malfunction in the sensor's performance, which can lead to erratic steering, compromised vehicle stability, and potential safety risks. Ignoring this code can result in further damage to the steering system and may lead to costly repairs down the line. Car owners should take this code seriously and seek diagnostic assistance to prevent further complications. Properly diagnosing and addressing the C0669 code not only restores the function of the steering system but also enhances overall vehicle safety and performance.

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

Symptoms

Common symptoms when C0669 is present:

  • The check engine light illuminates, staying on continuously, indicating a need for immediate attention.
  • Steering feels loose or unresponsive, leading to a vague driving experience, especially during turns.
  • The vehicle exhibits erratic handling, which can be felt as pulling to one side or difficulty maintaining straight-line stability.
  • Unexpected activation of traction control or stability control systems, leading to a decrease in overall vehicle confidence.
  • Difficulty in aligning the vehicle after a tire rotation or replacement, signaling potential issues with the steering angle sensor.

Possible Causes

Most common causes of C0669 (ordered by frequency):

  1. The most common cause of C0669 is a faulty steering angle sensor, which has a likelihood of around 50%. This sensor may fail due to wear and tear or electrical issues.
  2. Another cause could be damaged wiring or loose connections within the steering column, which compromises the sensor's signal to the ECU.
  3. Corrosion or poor contacts at connectors can also lead to inaccuracies in the sensor's readings, with about a 20% likelihood of occurrence.
  4. In some cases, software glitches in the vehicle's ECU can cause erroneous readings from the steering angle sensor, although this is less common.
  5. A rare cause could be a malfunction in the vehicle's anti-lock braking system (ABS) module, which may affect steering performance.

C0669 Repair Costs

Cost Breakdown by Repair Type

Steering Angle Sensor Replacement

Replacing the faulty steering angle sensor with an OEM part to restore proper function.

  • Total: $150 - $300
  • Success rate: 90%
Wiring Repair or Replacement

Repairing or replacing damaged wiring or connectors in the steering column.

  • Total: $100 - $200
  • Success rate: 80%
Money-Saving Tips for C0669
  • 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 C0669 Diagnosis Process

Follow these systematic steps to accurately diagnose C0669. 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 around the steering column (5-10 minutes)

Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion around the steering column (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, allowing for a more informed diagnosis (10-15 minutes)

Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context, allowing for a more informed diagnosis (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 the voltage and resistance of the steering angle sensor to confirm its functionality (20-30 minutes)

Step 3: Component testing - Use a multimeter to measure the voltage and resistance of the steering angle sensor to confirm its functionality (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 repairs, verify the proper operation of the steering angle sensor and clear any codes using the GeekOBD APP (10-15 minutes)

Step 4: System function test - After making repairs, verify the proper operation of the steering angle sensor and clear any 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 ensure the steering system operates correctly and the C0669 code does not return (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to ensure the steering system operates correctly and the C0669 code does not return (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 2016 Chevy Silverado

Vehicle: 2016 Chevrolet Silverado 1500, 45,000 miles

Problem: The customer reported a persistent check engine light and loose steering feel.

Diagnosis: After retrieving the C0669 code via the GeekOBD APP, a visual inspection revealed a faulty steering angle sensor.

Solution: The steering angle sensor was replaced, and the connections were cleaned to ensure proper function.

Cost: $250 (parts: $150 for sensor, $100 for labor)

Result: Post-repair, the steering system functioned correctly, and the check engine light was cleared.

Case Study 2: Wiring Repair on 2017 GMC Sierra

Vehicle: 2017 GMC Sierra 1500, 60,000 miles

Problem: Customer experienced traction control issues and a check engine light.

Diagnosis: Diagnostic tests indicated a C0669 code, leading to the discovery of damaged wiring in the steering column.

Solution: The damaged wiring was repaired, and connections were secured to restore functionality.

Cost: $180 (parts: $80 for wiring harness, $100 for labor)

Result: The vehicle was tested successfully, with no further check engine light or steering issues.

Diagnose C0669

Use GeekOBD APP for professional diagnosis!

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  • Professional-grade analysis
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Code Information

Code: C0669
System: Chassis (ABS, Steering, Suspension)
Severity: HIGH
Category: Chassis Codes