Quick Answer
C0B99 means: C0B99 indicates a body control module performance issue that affects electronic functions in your vehicle.
Can I drive with C0B99? It's advisable to address this code immediately as it may compromise vehicle safety features.
Common Questions
What does C0B99 mean and how does it affect my car?
The C0B99 code signifies a performance issue with the Body Control Module (BCM). This can lead to problems with various electronic functions in your vehicle, such as malfunctioning lights and windows. If not addressed, it could affect your vehicle's safety features and overall performance.
What are the most common causes of C0B99 and how much does it cost to fix?
Common causes include a faulty BCM, wiring issues, and software glitches, with repair costs ranging from $50 for a software update to $800 for a BCM replacement.
Can I drive my car with C0B99 or should I stop immediately?
While you may still be able to drive your vehicle, it's not recommended to ignore the C0B99 code. Doing so could compromise safety features like airbags and electronic stability control.
How can I diagnose C0B99 myself using GeekOBD APP?
Use the GeekOBD APP to scan for codes, check freeze frame data, and monitor BCM performance. Look for any abnormal readings that indicate a malfunction.
What vehicles are most commonly affected by C0B99?
The C0B99 code is frequently seen in 2016-2020 Ford Explorers, but it can also affect other models with a similar body control module setup.
How can I prevent C0B99 from happening again?
Regularly inspect and maintain your vehicle's electrical connections, ensuring they are clean and free from corrosion. Additionally, keep your BCM software up to date.
What is C0B99?
The Diagnostic Trouble Code (DTC) C0B99 indicates a performance issue with the Body Control Module (BCM). The BCM is a critical component that manages various electronic functions in your vehicle such as lighting, power windows, and door locks. When the BCM encounters a fault or fails to communicate effectively with other modules, it triggers this code. This can lead to several issues, including malfunctioning lights, non-responsive power windows, and problems with the vehicle’s security system. For example, if you own a 2016-2020 Ford Explorer, you might find that your interior lights flicker, or your keyless entry system doesn’t work as expected. The C0B99 code is associated with a lack of data exchange between the BCM and other control units, which can affect overall vehicle performance. Ignoring this code could lead to more severe electrical issues and might also impact your vehicle's safety features. Therefore, it's vital to address this code promptly by seeking professional help or utilizing diagnostic tools like the GeekOBD APP to identify the underlying issue.
System: C - Chassis (ABS, Steering, Suspension)
Symptoms
Common symptoms when C0B99 is present:
- Check engine light stays on constantly, indicating ongoing issues with the vehicle's electrical system.
- Interior lights flicker or do not function at all, which might confuse the driver, especially at night.
- Power windows fail to respond to the switch, limiting access to ventilation and comfort.
- Keyless entry system becomes unresponsive, preventing you from unlocking or locking your vehicle remotely.
- Dashboard warning lights may illuminate inconsistently, suggesting a broader issue with the vehicle's electrical network.
Possible Causes
Most common causes of C0B99 (ordered by frequency):
- Faulty Body Control Module (BCM) - Likely cause, with a 45% chance of being the issue. The BCM could be experiencing internal failures or corruption.
- Wiring Issues - Approximately 30% likelihood. Corroded or damaged wiring can hinder communication between the BCM and other modules.
- Software Glitches - About 15% of cases may be due to outdated or corrupt software within the BCM, which can be resolved with a simple update.
- Sensor Malfunctions - A less common cause (5% likelihood) where sensors connected to the BCM fail, leading to inaccurate data readings.
- Ground Connection Failure - Rare (5% likelihood) but can be serious; a poor ground connection can disrupt the entire electrical system.
C0B99 Repair Costs
Cost Breakdown by Repair Type
BCM Replacement
Replacing the faulty Body Control Module with a new or refurbished unit.
- Total: $300 - $800
- Success rate: 85%
Wiring Repair
Repairing damaged wiring or connections that may be affecting the BCM.
- Total: $100 - $300
- Success rate: 75%
Software Update
Updating the BCM software to resolve glitches.
- Total: $50 - $150
- Success rate: 90%
Money-Saving Tips for C0B99
- 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 C0B99 Diagnosis Process
Follow these systematic steps to accurately diagnose C0B99. 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).
Step 2: Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context (10-15 minutes)
Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context (10-15 minutes).
Step 3: Step 3: Component testing - Use a multimeter or diagnostic tools to test suspected components, focusing on the BCM and wiring harness (20-30 minutes)
Step 3: Component testing - Use a multimeter or diagnostic tools to test suspected components, focusing on the BCM and wiring harness (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 no codes reappear (15-20 minutes)
Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and ensure no codes reappear (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: BCM Replacement in 2018 Ford Explorer
Vehicle: 2018 Ford Explorer, 45,000 miles
Problem: Customer reported malfunctioning door locks and flickering interior lights.
Diagnosis: Diagnostic tests revealed a C0B99 code, indicating a BCM issue. Visual inspection showed signs of corrosion on the BCM connectors.
Solution: Replaced the BCM and cleaned all connections. Updated the software.
Cost: $600 (BCM: $500, Labor: $100)
Result: All functions returned to normal, and the customer reported no further issues.
Case Study 2: Wiring Repair in 2017 Ford Escape
Vehicle: 2017 Ford Escape, 30,000 miles
Problem: Keyless entry system was unresponsive, and check engine light was on.
Diagnosis: OBD scan revealed a C0B99 code. Further inspection found damaged wiring harness connected to the BCM.
Solution: Repaired the damaged wiring and reconnected loose terminals.
Cost: $200 (Wiring repair: $150, Labor: $50)
Result: Keyless entry system functioned properly post-repair and no codes returned.