C0185 - Understanding the Wheel Speed Sensor Malfunction in Chevrolet and GMC Models

Quick Answer

C0185 means: C0185 indicates a malfunction in the wheel speed sensor circuit, affecting braking performance.

Fix: Check and replace faulty components Cost: $100 - $300 Time: 90-180 minutes

Can I drive with C0185? Immediate attention is recommended to ensure braking safety.

Common Questions

What does C0185 mean and how does it affect my car?

C0185 indicates a problem with the wheel speed sensor circuit, which is vital for the ABS and traction control systems. If not addressed, it can lead to compromised braking performance and safety risks.

What are the most common causes of C0185 and how much does it cost to fix?

The most common cause of C0185 is a faulty wheel speed sensor, which can cost between $100 and $300 to replace. Other causes include damaged wiring and issues with the ABS control module, which can vary in repair costs.

Can I drive my car with C0185 or should I stop immediately?

It’s advised not to drive your vehicle with C0185, as it may affect your braking system and overall safety. Immediate inspection and repair are recommended.

How can I diagnose C0185 myself using GeekOBD APP?

Using the GeekOBD APP, you can retrieve diagnostic codes and freeze frame data, which will help you pinpoint the issue. Follow the app's guidance to test the wheel speed sensor performance.

What vehicles are most commonly affected by C0185?

DTC C0185 is commonly found in various Chevrolet and GMC models from 2007 to 2019, including the Chevrolet Silverado, GMC Sierra, and Chevrolet Equinox. Be sure to check for any recalls or technical service bulletins related to this code.

How can I prevent C0185 from happening again?

Regular maintenance, such as cleaning wheel speed sensors and checking wiring connections, can help prevent C0185 from reoccurring. Additionally, be cautious of road conditions that may cause physical damage to components.

What is C0185?

DTC C0185 is a diagnostic trouble code that indicates a malfunction in the wheel speed sensor circuit, often found in various Chevrolet and GMC vehicles, particularly those produced between 2007 and 2019. This code is triggered when the Engine Control Module (ECM) detects an issue with the signal from the wheel speed sensor, which is crucial for the Anti-lock Braking System (ABS) and traction control systems to function properly. When the wheel speed sensor fails, it can lead to inaccurate readings of wheel rotation speed, potentially causing the ABS light to illuminate on the dashboard. In real-world terms, this means that your vehicle's braking system may not engage optimally during emergency situations, which could compromise safety. Symptoms of this code can vary but typically include the ABS warning light being illuminated, erratic braking performance, and in some cases, traction control issues. Addressing this code promptly is crucial to ensure your vehicle maintains optimal safety and performance levels.

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

Symptoms

Common symptoms when C0185 is present:

  • The ABS light remains illuminated on the dashboard, indicating a fault in the braking system.
  • You may experience inconsistent braking behavior, such as sudden locking or slipping during emergency stops.
  • Traction control may become disabled, leading to poor vehicle handling, especially in adverse weather conditions.
  • There might be noticeable changes in the vehicle's acceleration, as the traction control system may not engage appropriately.
  • In some cases, the speedometer may also display inaccurate readings, leading to confusion while driving.

Possible Causes

Most common causes of C0185 (ordered by frequency):

  1. The most common cause of C0185 is a faulty wheel speed sensor, which can occur in approximately 70% of cases. This could result from wear and tear, dirt accumulation, or physical damage.
  2. Another frequent cause is damaged wiring or connectors within the wheel speed sensor circuit, accounting for around 20% of occurrences. Corrosion can lead to poor conductivity and signal issues.
  3. Less common causes include issues with the ABS control module itself, which may fail in rare instances. Regular maintenance checks can help prevent such failures.
  4. A failing or malfunctioning ECM can also trigger this code, though it is less likely, with an occurrence rate of around 5%. Keeping software updated may help prevent this.
  5. Finally, severe road conditions or accidents can lead to physical damage to the wheel speed sensor, which is a rare but possible cause.

C0185 Repair Costs

Cost Breakdown by Repair Type

Wheel Speed Sensor Replacement

Replacing a faulty wheel speed sensor is the most direct approach to resolving DTC C0185.

  • Total: $100 - $300
  • Success rate: 95%
Wiring Repair

Repairing damaged wiring or connectors may also be necessary if the sensor replacement does not resolve the issue.

  • Total: $50 - $150
  • Success rate: 90%
ABS Control Module Replacement

In rare cases, a failing ABS module may need to be replaced to resolve the code.

  • Total: $300 - $800
  • Success rate: 85%
Money-Saving Tips for C0185
  • 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 C0185 Diagnosis Process

Follow these systematic steps to accurately diagnose C0185. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Conduct an initial visual inspection - Check for any visible damage to the wheel speed sensor, wiring, or connectors (5-10 minutes)

Step 1: Conduct an initial visual inspection - Check for any visible damage to the wheel speed sensor, wiring, or connectors (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 - Retrieve all stored codes and review freeze frame data to understand the problem context (10-15 minutes)

Step 2: Use the GeekOBD APP to perform an OBD2 scan - Retrieve all stored codes and review freeze frame data to understand the problem 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: Test the wheel speed sensors using a multimeter - Measure the resistance and signal output to verify proper function (20-30 minutes)

Step 3: Test the wheel speed sensors using a multimeter - Measure the resistance and signal output to verify proper function (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: Perform a system function test - After any repairs, ensure the ABS and traction control systems work correctly by conducting a function test (10-15 minutes)

Step 4: Perform a system function test - After any repairs, ensure the ABS and traction control systems work correctly by conducting a function test (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 - Drive the vehicle under various conditions to confirm that the issue has been resolved and that no warning lights reappear (15-20 minutes)

Step 5: Conduct a road test - Drive the vehicle under various conditions to confirm that the issue has been resolved and that no warning lights reappear (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: Wheel Speed Sensor Replacement on a 2015 Chevrolet Silverado

Vehicle: 2015 Chevrolet Silverado 1500, 65,000 miles

Problem: Customer reported ABS light illuminating and poor braking performance.

Diagnosis: After scanning with GeekOBD APP, DTC C0185 was retrieved. Visual inspection revealed a damaged wheel speed sensor.

Solution: Replaced the faulty wheel speed sensor, cleared the code, and conducted a road test.

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

Result: Post-repair, the ABS light was off, and braking performance was restored.

Case Study 2: Wiring Repair for C0185 on a 2013 GMC Sierra

Vehicle: 2013 GMC Sierra 1500, 75,000 miles

Problem: Customer noticed the ABS light on and experienced erratic braking.

Diagnosis: DTC C0185 confirmed after an OBD2 scan. Inspection revealed frayed wiring near the wheel sensor.

Solution: Repaired the damaged wiring and connectors, then cleared the code.

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

Result: After repairs, the ABS light extinguished, and braking stability improved.

Diagnose C0185

Use GeekOBD APP for professional diagnosis!

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  • Step-by-step repair guidance
  • Professional-grade analysis
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Code Information

Code: C0185
System: Chassis (ABS, Steering, Suspension)
Severity: HIGH
Category: Chassis Codes