Quick Answer
C0878 means: C0878 indicates a malfunction in the brake control module.
Can I drive with C0878? Immediate attention is recommended to guarantee safety while driving.
Common Questions
What does C0878 mean and how does it affect my car?
C0878 indicates a malfunction in your vehicle's brake control module, which is crucial for ensuring safe braking performance. If this code is present, your ABS and traction control systems might not function properly, leading to potentially dangerous situations on the road.
What are the most common causes of C0878 and how much does it cost to fix?
Common causes include a faulty brake control module, damaged wiring, or malfunctioning wheel speed sensors. Repair costs can range from $150 for wiring repairs to $800 for a complete module replacement.
Can I drive my car with C0878 or should I stop immediately?
Driving with a C0878 code is risky as it indicates a brake system malfunction. It's advisable to stop driving and have the vehicle inspected to avoid any safety hazards.
How can I diagnose C0878 myself using GeekOBD APP?
You can use the GeekOBD APP to scan for diagnostic codes, view freeze frame data, and monitor the BCM's performance in real time. Follow the troubleshooting steps provided in the app for guidance on addressing the issue.
What vehicles are most commonly affected by C0878?
This code is frequently seen in 2013-2019 Chevrolet Silverado models, along with other GM vehicles produced during the same period, including the GMC Sierra and Cadillac Escalade.
How can I prevent C0878 from happening again?
To prevent C0878, ensure regular inspection and maintenance of your vehicle's brake system, including checking wiring and connections for wear. Keeping the software of the BCM updated can also help mitigate issues.
What is C0878?
The C0878 diagnostic trouble code (DTC) indicates a malfunction in the brake control module (BCM) within vehicles, particularly affecting models like the 2013-2019 Chevrolet Silverado. This code is typically triggered when the BCM detects a fault in the communication between the brake system and other critical control modules in the vehicle. The brake control module is a vital component that ensures the proper functioning of the anti-lock braking system (ABS) and electronic stability control (ESC). When C0878 is stored, you may notice various symptoms, including the illumination of warning lights on the dashboard, such as the ABS light or the traction control light. Ignoring this code can lead to reduced braking performance or even complete brake failure in extreme cases, posing serious safety risks. It’s essential to address this issue promptly, as it can affect the vehicle's handling and increase the likelihood of accidents. A thorough diagnostic is crucial to pinpoint the exact cause of the fault, which could range from software issues to hardware failures within the BCM. Regular maintenance and timely inspections can help prevent the occurrence of this code and ensure your vehicle's braking system operates effectively.
System: C - Chassis (ABS, Steering, Suspension)
Symptoms
Common symptoms when C0878 is present:
- The ABS warning light may remain illuminated on the dashboard, indicating a fault in the braking system.
- You might experience reduced braking performance, such as longer stopping distances or inconsistent braking feel.
- The traction control light can activate unexpectedly, which may affect vehicle stability during acceleration.
- Unusual noises, such as grinding or squeaking, may occur when applying the brakes, suggesting underlying issues.
- In severe cases, the vehicle may enter a limp mode, restricting engine power and limiting speed.
Possible Causes
Most common causes of C0878 (ordered by frequency):
- The most common cause of C0878 is a faulty brake control module itself, with a likelihood of around 60%. This could be due to internal component failures or software glitches.
- Second on the list is wiring issues, such as damaged connectors or corroded wires that compromise communication between the BCM and other systems.
- Thirdly, a malfunctioning wheel speed sensor can trigger this code, highlighting the importance of maintaining these components regularly.
- Less common but serious causes include issues with the vehicle’s ABS pump or faulty hydraulic control units that can lead to brake system failures.
- In rare cases, a complete failure of the vehicle’s power supply to the BCM can result in this code, requiring extensive troubleshooting.
C0878 Repair Costs
Cost Breakdown by Repair Type
Brake Control Module Replacement
Replacing the malfunctioning brake control module with a new or refurbished unit.
- Total: $400 - $800
- Success rate: 85%
Wiring Repair
Repairing or replacing damaged wiring and connectors that affect BCM communication.
- Total: $150 - $300
- Success rate: 75%
Money-Saving Tips for C0878
- 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 C0878 Diagnosis Process
Follow these systematic steps to accurately diagnose C0878. 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 that may affect the BCM (5-10 minutes)
Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion that may affect the BCM (5-10 minutes).
Step 2: Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context, utilizing the app to pinpoint issues (10-15 minutes)
Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context, utilizing the app to pinpoint issues (10-15 minutes).
Step 3: Step 3: Component testing - Use a multimeter to test the voltage and continuity of the BCM and associated wiring (20-30 minutes)
Step 3: Component testing - Use a multimeter to test the voltage and continuity of the BCM and associated wiring (20-30 minutes).
Step 4: Step 4: System function test - Verify proper operation after repairs and clear codes using the GeekOBD APP (10-15 minutes)
Step 4: System function test - Verify proper operation after repairs and clear codes using the GeekOBD APP (10-15 minutes).
Step 5: Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and ensure stability (15-20 minutes)
Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and ensure stability (15-20 minutes).
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: Repair of C0878 in 2015 Chevrolet Silverado
Vehicle: 2015 Chevrolet Silverado, 75,000 miles
Problem: Customer reported ABS light illuminated and inconsistent braking performance.
Diagnosis: After scanning with GeekOBD APP, C0878 was confirmed. A visual inspection revealed corroded wiring to the brake control module.
Solution: Replaced damaged wiring and updated the BCM software, ensuring proper communication.
Cost: $500 (includes $300 for parts and $200 for labor)
Result: Post-repair, the ABS light was off, and braking performance returned to normal.
Case Study 2: C0878 Troubleshooting in 2018 GMC Sierra
Vehicle: 2018 GMC Sierra, 45,000 miles
Problem: Customer experienced frequent traction control light activation and reduced braking response.
Diagnosis: Diagnostic revealed C0878; testing indicated a faulty brake control module.
Solution: Replaced the brake control module with a new unit, recalibrated the system using GeekOBD APP.
Cost: $750 (parts $500, labor $250)
Result: The issue was resolved, and the vehicle's braking system functioned correctly.