Quick Answer
C0808 means: C0808 indicates a communication fault in the ABS system of certain GM vehicles.
Can I drive with C0808? Address the issue immediately to ensure safe braking performance.
Common Questions
What does C0808 mean and how does it affect my car?
C0808 indicates a communication fault in the ABS system of your GM vehicle. This can lead to issues with braking performance and stability control, posing a safety risk. If you experience this code, it’s crucial to address it promptly to avoid further complications.
What are the most common causes of C0808 and how much does it cost to fix?
Common causes of C0808 include a faulty ABS control module, poor electrical connections, or software glitches. Repair costs can range from $100 for wiring repairs to $800 for module replacement, depending on the specific issue.
Can I drive my car with C0808 or should I stop immediately?
It is not safe to drive your vehicle with the C0808 code, as it can affect braking performance. It is advisable to have the issue checked out as soon as possible to ensure your safety on the road.
How can I diagnose C0808 myself using GeekOBD APP?
Using the GeekOBD APP, you can run a quick OBD2 scan to retrieve the C0808 code and any related codes. This will help you understand the context of the issue. Check for freeze frame data to see when the code triggered and look for any other codes that may be present.
What vehicles are most commonly affected by C0808?
C0808 is commonly seen in vehicles like the 2015-2018 Chevrolet Silverado and GMC Sierra, as well as other GM models from those years. There may also be recalls or technical service bulletins (TSBs) related to ABS issues in these vehicles.
How can I prevent C0808 from happening again?
To prevent C0808, regularly check and maintain the ABS system, including inspecting wiring and connectors for corrosion. Ensure software updates are applied as recommended by your dealer, and be proactive about addressing any warning lights on the dashboard.
What is C0808?
The diagnostic trouble code (DTC) C0808 is a manufacturer-specific code primarily associated with the General Motors (GM) vehicles, including popular models like the 2015-2018 Chevrolet Silverado and GMC Sierra. This code indicates a fault in the control module's communication or a malfunction in the system that controls the vehicle's anti-lock brake system (ABS) or traction control. When the C0808 code is triggered, it generally means that the vehicle's body control module (BCM) has detected an issue with the data being communicated to or from the ABS module. In practical terms, this can lead to compromised braking performance, resulting in a potential safety hazard. If the C0808 code is present, drivers may experience symptoms like the ABS warning light illuminating on the dashboard, along with possible erratic brake behavior or traction control system issues. Over time, if left untreated, this problem can lead to more significant brake system failures, making it essential to address the issue promptly. Vehicle owners should not ignore this code, as it can affect overall vehicle safety and performance. For those equipped with diagnostic tools like the GeekOBD APP, a quick scan can reveal additional trouble codes and provide insights into the specific issues at play, helping to tailor the repair process effectively.
System: C - Chassis (ABS, Steering, Suspension)
Symptoms
Common symptoms when C0808 is present:
- ABS warning light illuminated on the dashboard, indicating potential issues with the braking system.
- Traction control system malfunction, which may cause the vehicle to lose stability during slippery conditions.
- Unusual braking behavior, such as unexpected locking up or uneven braking performance.
- Error messages displayed on the dashboard related to braking systems.
- Increased stopping distance due to degraded braking performance.
Possible Causes
Most common causes of C0808 (ordered by frequency):
- The most common cause of the C0808 code is a faulty ABS control module, which accounts for about 40% of cases. This can happen due to electrical failures or internal component issues.
- Another frequent cause is poor electrical connections or corroded wiring harnesses leading to communication failures between the BCM and ABS module. Ensuring clean and secure connections can prevent this issue.
- A third potential cause is a software glitch within the control modules, which may require a firmware update or reprogramming to resolve.
- Less commonly, this code can be triggered by a malfunctioning wheel speed sensor, which affects the ABS system's ability to function properly.
- In rare instances, a complete failure of the BCM could occur, necessitating replacement to restore normal vehicle operation.
C0808 Repair Costs
Cost Breakdown by Repair Type
ABS Control Module Replacement
Replacing a faulty ABS control module to restore proper function.
- Total: $400 - $800
- Success rate: 85%
Wiring and Connector Repair
Repairing or replacing damaged wiring or connectors to ensure proper communication.
- Total: $100 - $300
- Success rate: 75%
Software Update/Reprogramming
Performing a software update to fix potential glitches in the control modules.
- Total: $50 - $150
- Success rate: 70%
Money-Saving Tips for C0808
- 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 C0808 Diagnosis Process
Follow these systematic steps to accurately diagnose C0808. 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
Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion. This should take about 5-10 minutes.
Step 2: Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context, which will take around 10-15 minutes
Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context, which will take around 10-15 minutes.
Step 3: Step 3: Component testing - Use a multimeter or specific diagnostic tools to test the ABS module and associated wiring
Step 3: Component testing - Use a multimeter or specific diagnostic tools to test the ABS module and associated wiring. This step typically takes 20-30 minutes.
Step 4: Step 4: System function test - After addressing any issues, verify the proper operation of the ABS system and clear codes to see if they return, which should take about 10-15 minutes
Step 4: System function test - After addressing any issues, verify the proper operation of the ABS system and clear codes to see if they return, which should take about 10-15 minutes.
Step 5: Step 5: Road test verification - Drive the vehicle under various conditions (including wet surfaces) to confirm the success of the repair, taking 15-20 minutes
Step 5: Road test verification - Drive the vehicle under various conditions (including wet surfaces) to confirm the success of the repair, taking 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: ABS Control Module Replacement on 2016 Chevrolet Silverado
Vehicle: 2016 Chevrolet Silverado, 75,000 miles
Problem: Customer reported ABS warning light and unstable braking performance.
Diagnosis: After an OBD2 scan, C0808 was retrieved. A visual inspection revealed corroded wiring near the ABS control module.
Solution: Replaced the ABS control module and repaired the damaged wiring. Conducted a system function test to ensure proper operation.
Cost: $650 (parts: ABS module $500, wiring repair $150)
Result: The ABS light was cleared, and the vehicle passed road tests without issues. Customer reported improved braking performance.
Case Study 2: Wiring Repair on 2017 GMC Sierra
Vehicle: 2017 GMC Sierra, 60,000 miles
Problem: Customer experienced intermittent ABS light with erratic braking behavior.
Diagnosis: OBD2 scan revealed C0808; a thorough inspection found loose connections and damaged wiring.
Solution: Repaired the wiring and reconnected the affected components. Verified operation through testing.
Cost: $200 (parts: wiring connectors $50, labor $150)
Result: Post-repair tests confirmed proper ABS functionality. The customer was satisfied with the cost-effective solution.