Quick Answer
B0908 means: B0908 indicates an internal fault in the Body Control Module (BCM).
Can I drive with B0908? Immediate attention is recommended to prevent further electrical issues.
Common Questions
What does B0908 mean and how does it affect my car?
The B0908 code indicates an internal fault in the Body Control Module (BCM), which affects various electronic systems in your vehicle. If not addressed, it can lead to severe electrical issues, impacting safety and functionality.
What are the most common causes of B0908 and how much does it cost to fix?
Common causes include a faulty BCM, corroded wiring, or electrical shorts, with repair costs ranging from $100 for reprogramming to $800 for a complete BCM replacement.
Can I drive my car with B0908 or should I stop immediately?
While it may be possible to drive short distances, it's not advisable due to potential electrical failures. Immediate diagnosis and repair are recommended to avoid being stranded.
How can I diagnose B0908 myself using GeekOBD APP?
Use the GeekOBD APP to scan for the B0908 code and review live data to pinpoint the affected circuits. Check for any freeze frame data that indicates when the fault occurred.
What vehicles are most commonly affected by B0908?
The B0908 code is frequently seen in models like the 2015-2020 Ford F-150 and 2018 Chevrolet Silverado, particularly those with advanced electrical features.
How can I prevent B0908 from happening again?
Regular inspections of electrical components and connections, along with ensuring that no aftermarket accessories are overloading the system, can help prevent future issues.
What is B0908?
The diagnostic trouble code (DTC) B0908 indicates an internal fault within the Body Control Module (BCM) of a vehicle. This module is crucial as it controls various electronic components in the car, such as lights, door locks, and the alarm system. When the BCM detects an issue that it cannot resolve or communicate, it triggers the B0908 code. Commonly found in vehicles like the 2015 Ford F-150 and 2018 Chevrolet Silverado, this code can lead to a myriad of electrical issues. For instance, you may experience malfunctioning lights, erratic door lock operation, or problems with the ignition system. If left unaddressed, the BCM fault can lead to complete electrical failures, leaving you stranded. Repairing this issue often involves more than just clearing the code; it may require reprogramming or replacing the BCM entirely, which can be a significant undertaking. It's essential to address the B0908 code promptly to ensure your vehicle's electronics function correctly and safely.
System: B - Body (Airbags, Lighting, Security, Climate Control)
Symptoms
Common symptoms when B0908 is present:
- The 'Check Engine' light may illuminate and stay on continuously, indicating a persistent issue.
- You may notice that the interior lights flicker or fail to turn on or off as expected, impacting visibility.
- The power door locks could become unresponsive or operate erratically, leading to security concerns.
- The vehicle may experience intermittent issues with the ignition system, causing difficulty starting.
- Overall electrical instability, such as warning lights on the dashboard, can also be a sign of BCM failure.
Possible Causes
Most common causes of B0908 (ordered by frequency):
- A faulty Body Control Module is the most common cause, with a likelihood of about 70%. This can arise from manufacturing defects or wear and tear over time.
- Corroded wiring connections to the BCM can cause communication failures, accounting for roughly 20% of cases. Regular inspections can help prevent this.
- Electrical shorts or overloads within the vehicle can lead to BCM malfunctions, making up about 5%. To mitigate this, ensure that all electronic accessories are functioning correctly.
- Less common causes include software glitches in the BCM itself, which may require reprogramming or updates.
- In rare cases, external factors such as water intrusion or extreme temperature conditions can damage the BCM.
B0908 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%
BCM Reprogramming
Reprogramming the existing BCM to resolve software issues.
- Total: $100 - $300
- Success rate: 60%
Money-Saving Tips for B0908
- 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 B0908 Diagnosis Process
Follow these systematic steps to accurately diagnose B0908. 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 in and around the BCM area (5-10 minutes)
Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion in and around the BCM area (5-10 minutes).
Step 2: Step 2: OBD2 scan using GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context better (10-15 minutes)
Step 2: OBD2 scan using GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context better (10-15 minutes).
Step 3: Step 3: Component testing - Use a multimeter or specialized diagnostic tools to test the BCM and its connections for continuity and proper function (20-30 minutes)
Step 3: Component testing - Use a multimeter or specialized diagnostic tools to test the BCM and its connections for continuity and proper function (20-30 minutes).
Step 4: Step 4: System function test - Verify the proper operation of all electronic components controlled by the BCM after repairs and clear any codes (10-15 minutes)
Step 4: System function test - Verify the proper operation of all electronic components controlled by the BCM after repairs and clear any codes (10-15 minutes).
Step 5: Step 5: Road test verification - Drive the vehicle under various conditions to confirm that all systems are functioning correctly and that the B0908 code does not return (15-20 minutes)
Step 5: Road test verification - Drive the vehicle under various conditions to confirm that all systems are functioning correctly and that the B0908 code does not return (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: 2015 Ford F-150 BCM Replacement
Vehicle: 2015 Ford F-150, 80,000 miles
Problem: Customer reported intermittent door lock failures and flickering interior lights.
Diagnosis: OBD2 scan revealed B0908 code. Visual inspection showed corroded connections.
Solution: Replaced the BCM and repaired wiring connections.
Cost: $600 (parts: $500 for BCM, $100 for labor)
Result: All electronic systems returned to normal operation, and customer satisfaction was high.
Case Study 2: 2018 Chevrolet Silverado BCM Reprogramming
Vehicle: 2018 Chevrolet Silverado, 40,000 miles
Problem: Customer experienced erratic dashboard lights and power door lock issues.
Diagnosis: Scan revealed B0908 code, but BCM appeared intact upon inspection.
Solution: Reprogrammed the BCM using specialized software.
Cost: $150 (reprogramming only)
Result: Dash indicators stabilized, and locks functioned correctly post-repair.