Quick Answer
B1308 means: B1308 indicates a malfunction in the Body Control Module (BCM), affecting electronic functions.
Can I drive with B1308? Immediate attention is recommended to prevent further electronic issues.
Common Questions
What does B1308 mean and how does it affect my car?
The B1308 code signifies a malfunction in the Body Control Module (BCM), affecting various electronic features. If your BCM is faulty, you may experience issues with windows, locks, lights, and even the vehicle alarm. Immediate attention is important to avoid further complications.
What are the most common causes of B1308 and how much does it cost to fix?
Common causes of the B1308 code include a faulty BCM, wiring issues, and poor ground connections. Repair costs can range from $300 to $800, depending on whether you need just a repair or a complete BCM replacement.
Can I drive my car with B1308 or should I stop immediately?
While you may be able to drive with this code, it is not advisable. Malfunctions can lead to unsafe conditions, such as lights failing or power locks becoming unresponsive. It's best to address the issue promptly.
How can I diagnose B1308 myself using GeekOBD APP?
You can use the GeekOBD APP to scan your vehicle for trouble codes, analyze live data, and view freeze frame data. Start by connecting the app to your vehicle's OBD2 port to retrieve the B1308 code, which will help you understand the malfunction's context.
What vehicles are most commonly affected by B1308?
The B1308 code is frequently seen in 2006-2016 Chevrolet and GMC models, such as the Silverado, Tahoe, and Sierra. Keep an eye on recalls and Technical Service Bulletins (TSBs) related to the BCM for these vehicles.
How can I prevent B1308 from happening again?
Regularly inspect your vehicle's electrical system, including wiring harnesses and connections. Keeping the BCM area dry and free from moisture will also help prevent issues. Routine maintenance checks can catch potential problems early.
What is B1308?
The diagnostic trouble code (DTC) B1308 indicates a malfunction within the Body Control Module (BCM), which is responsible for controlling various electronic functions in your vehicle, such as lights, locks, and other accessories. This code is particularly common in 2006-2016 Chevrolet and GMC models, including popular vehicles like the Silverado and Tahoe. When the BCM detects an error or malfunction in its internal circuitry or communication with other modules, it triggers the B1308 code. In real-world terms, this can lead to symptoms like malfunctioning lights, unresponsive locks, or even issues with your vehicle’s alarm system. Ignoring this code can result in further electronic failures, potentially impacting the overall safety and functionality of your vehicle. It's crucial to address this issue promptly to maintain optimal performance and safety. If you're experiencing any electronic malfunctions in your vehicle, it’s advisable to seek professional diagnostics as soon as possible.
System: B - Body (Airbags, Lighting, Security, Climate Control)
Symptoms
Common symptoms when B1308 is present:
- Check engine light stays on constantly, indicating an ongoing issue with the BCM.
- Power windows and locks may become unresponsive or act erratically, leading to frustration while driving.
- Interior and exterior lights may flicker or fail to turn on, significantly impacting night visibility and safety.
- Random alarm activation, which can be annoying and may lead to concerns about vehicle security.
- The vehicle may exhibit erratic behavior, such as difficulty starting or intermittent electrical failures.
Possible Causes
Most common causes of B1308 (ordered by frequency):
- Faulty Body Control Module (BCM) - Likelihood: 60%. This is the most common cause, often due to internal component failure.
- Wiring issues - Likelihood: 25%. Damaged or corroded wiring harnesses can disrupt communication between the BCM and other systems.
- Poor ground connections - Likelihood: 10%. Bad ground connections can lead to inconsistent signals and malfunctions.
- Battery voltage issues - Likelihood: 3%. Low battery voltage can cause the BCM to behave unpredictably, triggering this code.
- Less common but serious cause includes water intrusion in the BCM area, which can lead to significant electronic failures.
B1308 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: 90%
Money-Saving Tips for B1308
- 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 B1308 Diagnosis Process
Follow these systematic steps to accurately diagnose B1308. Each step builds on the previous one to ensure accurate diagnosis.
Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion (5-10 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: Component testing - Use multimeter or specific diagnostic tools to test suspected components such as the BCM (20-30 minutes)
Step 4: System function test - Verify proper operation after repairs and clear codes (10-15 minutes)
Step 5: Road test verification - Drive vehicle under various conditions to confirm repair success (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 2010 Chevrolet Silverado
Vehicle: 2010 Chevrolet Silverado, 120,000 miles
Problem: Customer reported that the power locks and interior lights were malfunctioning.
Diagnosis: After conducting an OBD2 scan, the B1308 code was retrieved. A visual inspection revealed corrosion on the BCM connectors.
Solution: Replaced the BCM and cleaned the affected wiring. Cleared the codes and tested all electronic functions.
Cost: $600 (BCM $500, labor $100)
Result: All electronic functions were restored, and the customer reported satisfaction with the repair.
Case Study 2: Wiring Repair on 2015 GMC Sierra
Vehicle: 2015 GMC Sierra, 80,000 miles
Problem: The vehicle experienced intermittent issues with the tail lights and alarm system.
Diagnosis: The diagnostic scan indicated B1308. Further inspection showed damaged wiring near the BCM.
Solution: Repaired the damaged wiring and reconnected the BCM. Conducted a full system test.
Cost: $250 (labor $100, wiring repair $150)
Result: The issue was resolved, and all affected systems functioned properly post-repair.