C0CAC - Understanding DTC C0CAC: A Guide for Commonly Affected Vehicles Like 2015-2018 Chevrolet Silverado

Quick Answer

C0CAC means: C0CAC refers to a malfunction in the electric parking brake system.

Fix: Check and replace faulty components Cost: $200 - $600 Time: 90-180 minutes

Can I drive with C0CAC? Immediate attention is recommended to ensure vehicle safety.

Common Questions

What does C0CAC mean and how does it affect my car?

C0CAC indicates an issue with your vehicle's electric parking brake system. If this code is present, it could mean that your parking brake may not work correctly, which can lead to safety hazards such as the vehicle rolling away when parked. It's essential to address this promptly.

What are the most common causes of C0CAC and how much does it cost to fix?

Common causes of C0CAC include a faulty electric parking brake module, damaged wiring, or a malfunctioning brake switch. Repair costs can range from $100 to $600 depending on the specific issue and required parts.

Can I drive my car with C0CAC or should I stop immediately?

Driving with a C0CAC code is not advisable as it indicates potential failure of the parking brake system. You should stop driving and have the vehicle inspected to prevent accidents.

How can I diagnose C0CAC myself using GeekOBD APP?

Using the GeekOBD APP, you can scan your vehicle for diagnostic codes, analyze freeze frame data, and perform a system check to identify issues with the electric parking brake system.

What vehicles are most commonly affected by C0CAC?

The C0CAC code is frequently seen in models like the 2015-2018 Chevrolet Silverado and other GM vehicles equipped with electric parking brakes. It's essential to check for any recalls related to this issue.

How can I prevent C0CAC from happening again?

Regular maintenance of the braking system, including checking wiring and connections, can help prevent C0CAC. Additionally, ensuring software updates for your vehicle's ECU may also minimize future issues.

What is C0CAC?

DTC C0CAC is a diagnostic trouble code that indicates a malfunction related to the vehicle's electric parking brake (EPB) system. This code typically surfaces when the electronic control unit (ECU) detects an issue with the communication between the brake control module and the ECU. For many car owners, especially those driving models like the 2015-2018 Chevrolet Silverado, this code can lead to serious implications if ignored. When C0CAC is triggered, the electronic parking brake may not function as intended, leading to difficulties in parking securely, especially on inclines. Additionally, this issue can disable other related systems, impacting overall vehicle safety. A vehicle with a stored C0CAC code may exhibit symptoms like the parking brake warning light illuminating on the dashboard or the inability to engage or disengage the parking brake properly. In some cases, drivers may notice that the vehicle rolls unexpectedly when parked. If you encounter this code, it is crucial to address it promptly to avoid potential safety hazards and ensure your vehicle operates smoothly.

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

Symptoms

Common symptoms when C0CAC is present:

  • The parking brake warning light is illuminated on the dashboard, indicating a fault in the system.
  • Drivers may experience difficulty in engaging or disengaging the parking brake, leading to potential safety risks.
  • Unexpected rolling of the vehicle when parked, particularly on an incline, which can pose serious hazards.
  • Vehicle may not hold in place as expected when parked, making it challenging to secure the car.
  • Unusual noises when attempting to activate the parking brake, such as grinding or clicking sounds.

Possible Causes

Most common causes of C0CAC (ordered by frequency):

  1. The most common cause of the C0CAC code is a faulty electric parking brake module, which accounts for about 60% of cases. This component can fail due to wear and tear or electrical issues.
  2. Another frequent cause is damaged wiring or loose connections in the parking brake system, which can disrupt communication between the brake control module and the ECU.
  3. A malfunctioning brake switch can also trigger the C0CAC code. This switch may get stuck or fail to send the correct signals, leading to issues with the parking brake.
  4. Less common but serious causes include software issues within the ECU, which may require a software update or a complete reset.
  5. In rare cases, environmental factors like water intrusion into the brake control module can lead to corrosion and subsequent electrical failures.

C0CAC Repair Costs

Cost Breakdown by Repair Type

Replace Electric Parking Brake Module

Replacing the faulty electric parking brake module can resolve the C0CAC code effectively.

  • Total: $200 - $600
  • Success rate: 90%
Repair Wiring Harness

Repairing or replacing damaged wiring and connectors in the parking brake system.

  • Total: $100 - $300
  • Success rate: 80%
Money-Saving Tips for C0CAC
  • 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 C0CAC Diagnosis Process

Follow these systematic steps to accurately diagnose C0CAC. 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 electric parking brake components (5-10 minutes)

Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion around the electric parking brake 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 the current and historical trouble codes, along with freeze frame data to comprehend the fault context (10-15 minutes)

Step 2: OBD2 scan with GeekOBD APP - Use the GeekOBD APP to retrieve the current and historical trouble codes, along with freeze frame data to comprehend the fault 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: Component testing - Use a multimeter to test the voltage and resistance of the electric parking brake module and check for proper operation (20-30 minutes)

Step 3: Component testing - Use a multimeter to test the voltage and resistance of the electric parking brake module and check for proper operation (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 any repairs, verify the proper operation of the electric parking brake and clear the codes using the GeekOBD APP (10-15 minutes)

Step 4: System function test - After any repairs, verify the proper operation of the electric parking brake and clear the 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 parking brake engages and disengages correctly (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to ensure the parking brake engages and disengages 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: Electric Parking Brake Module Replacement on 2016 Chevrolet Silverado

Vehicle: 2016 Chevrolet Silverado, 45,000 miles

Problem: Customer reported the parking brake warning light was illuminated and the parking brake was non-functional.

Diagnosis: Upon inspection, the OBD2 scan revealed a C0CAC code. The electric parking brake module was tested and found to be faulty.

Solution: Replaced the electric parking brake module and cleared the trouble code using the GeekOBD APP.

Cost: $450 (parts $350, labor $100)

Result: The parking brake function was restored, and no further issues were noted during the follow-up.

Case Study 2: Wiring Harness Repair on 2017 GMC Sierra

Vehicle: 2017 GMC Sierra, 30,000 miles

Problem: Customer experienced intermittent issues with the parking brake, often failing to engage.

Diagnosis: The diagnostic process indicated a C0CAC code. Inspection revealed damaged wiring in the parking brake system.

Solution: Repaired the damaged wiring and ensured secure connections throughout the system.

Cost: $200 (parts $50, labor $150)

Result: The parking brake worked correctly post-repair, and the customer reported no further issues.

Diagnose C0CAC

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: C0CAC
System: Chassis (ABS, Steering, Suspension)
Severity: HIGH
Category: Chassis Codes