Quick Answer
B0659 means: B0659 indicates a malfunction in the Body Control Module affecting electronic systems.
Can I drive with B0659? Seek immediate diagnosis to prevent further electrical issues.
Common Questions
What does B0659 mean and how does it affect my car?
The B0659 code indicates a malfunction in the Body Control Module (BCM), which controls various electronic components in your vehicle. If this module fails, you may experience issues with power locks, lighting, and even starting your car. Addressing this code is crucial to maintaining the efficiency and safety of your vehicle.
What are the most common causes of B0659 and how much does it cost to fix?
Common causes of B0659 include a faulty BCM, wiring issues, and corrosion at connections. Repair costs can range from $100 for simple wiring fixes to $600 for BCM replacement, depending on the specific problem and vehicle model.
Can I drive my car with B0659 or should I stop immediately?
It's advisable to have your vehicle diagnosed as soon as possible. Driving with a malfunctioning BCM can lead to further electrical problems and may compromise safety features like power locks and lighting.
How can I diagnose B0659 myself using GeekOBD APP?
Using the GeekOBD APP, you can perform a quick scan of your vehicle's diagnostic codes. Look for B0659 and any additional codes that may provide context. The app can also give you freeze frame data to help pinpoint when the issue occurs.
What vehicles are most commonly affected by B0659?
The B0659 code is frequently seen in 2010-2015 Chevrolet Equinox and GMC Terrain models. Be sure to check for any recalls or Technical Service Bulletins (TSBs) related to electronic systems in these vehicles.
How can I prevent B0659 from happening again?
Regular maintenance checks of your vehicle's electrical system can help prevent B0659. Ensure wiring is intact and connectors are clean and secure. Additionally, consider using protective sprays on electrical connections to guard against moisture and corrosion.
What is B0659?
The Diagnostic Trouble Code (DTC) B0659 indicates a malfunction in the Body Control Module (BCM), which is responsible for controlling various electronic components in your vehicle such as power windows, lighting, and door locks. When this code is triggered, it typically means there’s a communication issue between the BCM and other modules in the vehicle or a fault within the BCM itself. This can result in multiple symptoms such as inoperative components, warning lights on the dashboard, or erratic behavior of electronic systems. Car owners may experience issues like the inability to lock or unlock doors with the remote, interior lights malfunctioning, or the vehicle failing to start due to a BCM-related fault. Ignoring this code can lead to more significant electrical problems down the line, resulting in costly repairs and potential safety hazards. It's important to address this issue promptly to ensure your vehicle's electronic systems function correctly and reliably.
System: B - Body (Airbags, Lighting, Security, Climate Control)
Symptoms
Common symptoms when B0659 is present:
- The check engine light is illuminated, indicating a fault in one or more systems controlled by the BCM.
- Power locks may not function properly, with the remote failing to lock or unlock the doors.
- Interior and exterior lights flicker or do not operate as expected, leading to visibility issues at night.
- The vehicle may experience starting issues, such as not cranking or intermittent starting failures due to BCM malfunction.
- Communication errors with other modules might trigger additional diagnostic codes, complicating troubleshooting.
Possible Causes
Most common causes of B0659 (ordered by frequency):
- The most common cause is a faulty Body Control Module (BCM), which has a likelihood of around 60%. This can stem from manufacturing defects or exposure to moisture.
- Wiring issues, such as frayed or damaged wires leading to the BCM, account for about 20% of cases. These can often be caused by wear and tear over time.
- Corrosion at the BCM connectors or poor ground connections can contribute to 10% of B0659 codes. Regular inspections can help identify these issues early.
- Less common but serious causes include short circuits in the vehicle's electrical system, which can lead to extensive damage if not addressed.
- A rare cause might be software glitches in the BCM, which could require a software update or reprogramming to resolve.
B0659 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: 90%
Wiring Repair
Repairing damaged wiring or connectors that may be causing communication issues.
- Total: $100 - $300
- Success rate: 80%
Software Update
Updating the BCM software to resolve potential glitches.
- Total: $50 - $150
- Success rate: 75%
Money-Saving Tips for B0659
- 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 B0659 Diagnosis Process
Follow these systematic steps to accurately diagnose B0659. 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 BCM (5-10 minutes)
Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion around 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 and gather additional insights (10-15 minutes)
Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context and gather additional insights (10-15 minutes).
Step 3: Step 3: Component testing - Use a multimeter or specific diagnostic tools to test the BCM and associated wiring for continuity and proper voltage (20-30 minutes)
Step 3: Component testing - Use a multimeter or specific diagnostic tools to test the BCM and associated wiring for continuity and proper voltage (20-30 minutes).
Step 4: Step 4: System function test - After any repairs, verify the proper operation of electronic systems before clearing codes (10-15 minutes)
Step 4: System function test - After any repairs, verify the proper operation of electronic systems before clearing codes (10-15 minutes).
Step 5: Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and ensure no additional codes appear (15-20 minutes)
Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and ensure no additional codes appear (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 on 2013 Chevrolet Equinox
Vehicle: 2013 Chevrolet Equinox, 75,000 miles
Problem: Customer reported power locks not responding and intermittent dashboard warning lights.
Diagnosis: OBD2 scan revealed B0659 and additional codes related to BCM malfunction. Visual inspection showed corrosion on connectors.
Solution: Replaced the BCM and cleaned all connections, ensuring proper grounding.
Cost: $450 (BCM: $350, Labor: $100)
Result: Vehicle operated normally post-repair with all electronic systems functioning properly.
Case Study 2: Wiring Repair on 2014 GMC Terrain
Vehicle: 2014 GMC Terrain, 85,000 miles
Problem: Customer experienced frequent starting issues and flickering interior lights.
Diagnosis: Diagnostic scan confirmed B0659; inspection revealed frayed wiring harness near the BCM.
Solution: Repaired the damaged wiring and secured the harness to prevent future wear.
Cost: $200 (Labor: $100, Wiring: $100)
Result: After repairs, vehicle started reliably with no further electrical issues.