Quick Answer
B0C86 means: B0C86 indicates an issue with the body control module's communication.
Can I drive with B0C86? Immediate attention is recommended to prevent further electrical issues.
Common Questions
What does B0C86 mean and how does it affect my car?
The B0C86 code signifies a communication issue between your vehicle's body control module and other systems. It can lead to problems like malfunctioning door locks and interior lights, potentially affecting the vehicle's security and convenience features.
What are the most common causes of B0C86 and how much does it cost to fix?
Common causes include a faulty body control module, wiring issues, and door control module malfunctions. Repair costs can range from $100 for wiring repairs to $600 for a BCM replacement, depending on the specific repairs needed.
Can I drive my car with B0C86 or should I stop immediately?
While you might be able to drive your vehicle, it's advisable to address the B0C86 code promptly. Ignoring it can lead to further electrical issues or safety concerns, particularly if modules like the alarm or door locks are affected.
How can I diagnose B0C86 myself using GeekOBD APP?
To diagnose B0C86 with GeekOBD APP, connect your OBD2 scanner, access the app, and scan for trouble codes. Review the freeze-frame data for context, check the BCM and related components, and note any additional codes that may provide insight into the issue.
What vehicles are most commonly affected by B0C86?
B0C86 is frequently seen in 2017-2020 models of Chrysler, Jeep, and Dodge vehicles. If you own one of these vehicles, it's essential to be aware of this code and its potential implications.
How can I prevent B0C86 from happening again?
To prevent the B0C86 code from recurring, maintain your vehicle's electrical system by regularly inspecting wiring and connections for wear. Ensure battery health is optimal, and consider having the BCM software updated at your dealership if applicable.
What is B0C86?
The diagnostic trouble code (DTC) B0C86 indicates a problem within the vehicle's body control module (BCM) or its communication with other systems. This code is particularly common in vehicles manufactured by brands like Chrysler, Jeep, and Dodge, especially models from 2017 to 2020. When the BCM detects an inconsistency in the data it receives from other modules—such as the door modules or lighting systems—it triggers the B0C86 code. This can manifest in various ways, impacting the vehicle's functionality. Real-world implications include issues with locking and unlocking doors, trouble with interior lighting, or even problems with the vehicle's alarm system. If left unaddressed, the B0C86 code can lead to more significant electrical issues or even safety concerns, as it may affect essential vehicle features like anti-theft systems or power windows. Therefore, understanding this code and acting promptly can help maintain your vehicle's performance and safety.
System: B - Body (Airbags, Lighting, Security, Climate Control)
Symptoms
Common symptoms when B0C86 is present:
- The check engine light is illuminated, indicating a fault in the vehicle's electrical system.
- Power door locks fail to respond consistently, with intermittent locking or unlocking issues experienced by the driver.
- Interior lights do not operate as expected, either staying on or failing to illuminate when doors are opened.
- The alarm system may trigger unexpectedly, causing false alarms that disrupt the driver and neighbors.
- Dashboard warning indicators may flash or remain lit, indicating multiple electrical faults within the vehicle.
Possible Causes
Most common causes of B0C86 (ordered by frequency):
- Faulty body control module (BCM) - 40% likelihood. This is the most common cause of the B0C86 code, often due to internal failures or software glitches.
- Wiring issues - 25% likelihood. Damaged or corroded wiring can disrupt communication between the BCM and other modules, leading to the code.
- Faulty door modules - 20% likelihood. Problems with individual door control modules can send erroneous signals to the BCM.
- Poor ground connection - 10% likelihood. A bad ground can create electrical noise, leading to communication errors.
- Battery issues - 5% likelihood. A weak or failing battery can cause voltage fluctuations that trigger the B0C86 code.
B0C86 Repair Costs
Cost Breakdown by Repair Type
BCM Replacement
Replacing the faulty body control module with a new or refurbished unit.
- Total: $300 - $600
- Success rate: 85%
Wiring Repair
Repairing or replacing damaged wiring that affects module communication.
- Total: $100 - $300
- Success rate: 70%
Door Module Replacement
Replacing individual door control modules if they are found to be faulty.
- Total: $150 - $250 per door module
- Success rate: 75%
Money-Saving Tips for B0C86
- 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 B0C86 Diagnosis Process
Follow these systematic steps to accurately diagnose B0C86. Each step builds on the previous one to ensure accurate diagnosis.
Step 1: Step 1: Perform an initial visual inspection to check for damaged wiring, loose connections, or corrosion around the BCM and related modules (5-10 minutes)
Step 1: Perform an initial visual inspection to check for damaged wiring, loose connections, or corrosion around the BCM and related modules (5-10 minutes).
Step 2: Step 2: Use the GeekOBD APP to conduct an OBD2 scan, retrieving all trouble codes and freeze-frame data for context (10-15 minutes)
Step 2: Use the GeekOBD APP to conduct an OBD2 scan, retrieving all trouble codes and freeze-frame data for context (10-15 minutes).
Step 3: Step 3: Test the BCM and related components using a multimeter to verify voltage and continuity (20-30 minutes)
Step 3: Test the BCM and related components using a multimeter to verify voltage and continuity (20-30 minutes).
Step 4: Step 4: Conduct a system function test to ensure all modules communicate correctly after necessary repairs and clear any codes (10-15 minutes)
Step 4: Conduct a system function test to ensure all modules communicate correctly after necessary repairs and clear any codes (10-15 minutes).
Step 5: Step 5: Perform a road test under various conditions to confirm the repair was successful and ensure no codes reappear (15-20 minutes)
Step 5: Perform a road test under various conditions to confirm the repair was successful 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 for 2018 Jeep Wrangler
Vehicle: 2018 Jeep Wrangler, 45,000 miles
Problem: Customer reported intermittent door locking issues and check engine light illuminated.
Diagnosis: Diagnosed with the B0C86 code through OBD2 scan; BCM found faulty.
Solution: Replaced the BCM with a new unit and reprogrammed it to the vehicle.
Cost: $450 (includes parts and labor)
Result: All functions restored, and the check engine light remained off after driving for one week.
Case Study 2: Wiring Repair for 2020 Dodge Charger
Vehicle: 2020 Dodge Charger, 30,000 miles
Problem: Interior lights malfunctioning and alarm system triggering randomly.
Diagnosis: B0C86 code displayed; visual inspection revealed damaged wiring in the driver's door.
Solution: Repaired the wiring harness and secured all connections.
Cost: $120 (including labor)
Result: Interior lights functioned correctly, and alarm issues resolved.