C0172 - Understanding DTC C0172: Common Issues in 2015-2018 Chevrolet Silverado and Other Models

Quick Answer

C0172 means: DTC C0172 signifies a malfunction in the wheel speed sensor circuit, affecting brake and traction control systems.

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

Can I drive with C0172? Immediate attention is recommended to ensure safe vehicle operation.

Common Questions

What does C0172 mean and how does it affect my car?

DTC C0172 signals a problem with your vehicle's wheel speed sensor circuit. This can disrupt your ABS and traction control, leading to potential safety issues, especially in slippery conditions. If unresolved, it can compromise braking performance and increase the risk of accidents.

What are the most common causes of C0172 and how much does it cost to fix?

The primary cause of C0172 is a faulty wheel speed sensor, which can cost between $150 to $300 to replace. Other causes, like wiring issues or ABS module failure, can also lead to this code, with repair costs varying based on the complexity of the problem.

Can I drive my car with C0172 or should I stop immediately?

It is not safe to drive with DTC C0172 active. Ignoring this code can affect your braking and traction control systems, leading to potentially dangerous driving conditions. Immediate inspection and repair are recommended.

How can I diagnose C0172 myself using GeekOBD APP?

To diagnose C0172 with the GeekOBD APP, connect the app to your vehicle's OBD2 port. Run a scan to retrieve the code and any additional codes. Review freeze frame data to assess conditions when the code triggered, then inspect the wheel speed sensor and wiring based on this information.

What vehicles are most commonly affected by C0172?

Commonly affected vehicles include the 2015-2018 Chevrolet Silverado, GMC Sierra, and various models from Ford and Dodge. Always check for any specific recalls or Technical Service Bulletins that may pertain to your vehicle.

How can I prevent C0172 from happening again?

Regular maintenance checks, including inspecting wiring and connections for wear and tear, can help prevent C0172. Keeping your vehicle clean and free of debris can also minimize the risk of sensor damage.

What is C0172?

DTC C0172 is a diagnostic trouble code that indicates a malfunction in the wheel speed sensor circuit. This code commonly appears in vehicles equipped with anti-lock braking systems (ABS) and traction control features, particularly in models like the 2015-2018 Chevrolet Silverado. When your vehicle’s onboard diagnostics detect a problem with the wheel speed sensor, it triggers this code to alert the driver. The wheel speed sensor is crucial because it helps the ABS module determine the speed of each wheel, allowing for efficient braking and traction control. If the sensor is malfunctioning, it can lead to compromised braking performance, increased stopping distances, and an elevated risk of skidding or losing control during adverse driving conditions. In practical terms, if you see this code, it is essential to address it promptly to ensure your vehicle remains safe and dependable. Ignoring this issue can lead to further complications, including damage to the ABS system and costly repairs down the line. Therefore, understanding DTC C0172 is not just about fixing a light but ensuring your vehicle's safety and performance on the road.

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

Symptoms

Common symptoms when C0172 is present:

The check engine light remains illuminated, indicating an ongoing issue that needs attention.
You may notice erratic braking behavior, such as the ABS activating unexpectedly during normal braking conditions.
Fuel economy can decrease by 10-15% due to increased load on the engine from improper traction control engagement.
The vehicle may experience a loss of traction control, particularly on slippery surfaces, which can lead to skidding.
Unusual sounds during braking, such as grinding or squeaking, might occur if the brake system is compromised.

Possible Causes

Most common causes of C0172 (ordered by frequency):

{'cause': 'Worn or damaged wheel speed sensor (60%)', 'details': 'The most common cause is a defective wheel speed sensor, often due to wear and tear from road debris or exposure to harsh conditions.'}
{'cause': 'Faulty wiring or connectors (25%)', 'details': 'Corroded or damaged wiring and connectors can disrupt the electrical signal between the sensor and the ABS module.'}
{'cause': 'ABS module failure (10%)', 'details': 'A malfunctioning ABS control module can lead to incorrect readings, triggering the C0172 code.'}
{'cause': 'Brake system issues (3%)', 'details': 'Less common causes include issues within the brake system itself, such as stuck brake calipers.'}
{'cause': 'ECM software glitch (2%)', 'details': 'Rarely, a software issue within the Engine Control Module (ECM) can cause false readings and trigger this code.'}

C0172 Repair Costs

Cost Breakdown by Repair Type

Wheel Speed Sensor Replacement

Replacing the faulty wheel speed sensor is the most common repair for DTC C0172.

Total: $150 - $300
Success rate: 95%

Wiring Repair

Repairing or replacing damaged wiring and connectors can resolve the issue if the sensor is functional.

Total: $100 - $200
Success rate: 85%

Money-Saving Tips for C0172

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 C0172 Diagnosis Process

Follow these systematic steps to accurately diagnose C0172. 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).