B108C - Understanding the Body Control Module Code for 2016-2022 Ford Explorer and More

Quick Answer

B108C means: B108C indicates a malfunction related to the driver's door latch position sensor in the Body Control Module.

Fix: Check and replace faulty components Cost: $150 - $300 Time: 90-180 minutes

Can I drive with B108C? Immediate attention recommended to prevent further electrical system malfunctions.

Common Questions

What does B108C mean and how does it affect my car?

B108C means there's an issue with your car's Body Control Module related to the driver's door latch position sensor. This can affect various electrical functions like locking/unlocking doors, and if left unaddressed, might lead to further electrical problems or even security issues.

What are the most common causes of B108C and how much does it cost to fix?

The most common cause is a faulty driver's door latch position sensor, which typically costs between $150 and $300 to replace. Other causes could be wiring issues or a malfunctioning BCM, which might add more complexity and cost to the repair.

Can I drive my car with B108C or should I stop immediately?

While you can technically drive your vehicle with the B108C code, it is not advisable. The issue may cause problems with door locks and security features, which can compromise safety. It’s best to get it checked out as soon as possible.

How can I diagnose B108C myself using GeekOBD APP?

To diagnose B108C with the GeekOBD APP, connect it to your vehicle’s OBD2 port. Use the app to read the trouble codes and view freeze frame data, which can help you understand the fault’s context and pinpoint the issue more effectively.

What vehicles are most commonly affected by B108C?

B108C is frequently found in models like the 2016-2022 Ford Explorer and may also appear in other vehicles with similar Body Control Module configurations, including some models from Lincoln and Mercury within the same production years.

How can I prevent B108C from happening again?

To prevent B108C from reoccurring, regularly check the condition of your vehicle’s wiring and connectors, especially around the door areas. Ensure that your BCM is updated with the latest software and handle the doors gently to avoid unnecessary wear on the latches.

What is B108C?

DTC B108C is a diagnostic trouble code that pertains to issues with the Body Control Module (BCM), specifically indicating a malfunction related to the driver's door latch position sensor. This code is commonly encountered in vehicles like the 2016-2022 Ford Explorer, but can also appear in other makes and models equipped with similar BCM systems. The BCM plays a crucial role in managing various electrical systems in your vehicle, including lighting, locks, and alarms. When the BCM detects an abnormality with the driver's door latch position, it triggers the B108C code. This might manifest in real-world scenarios such as the interior lights not turning on when the door is opened, or the power locks failing to respond properly. Ignoring this code can lead to further electrical system failures or security issues, making it essential to address promptly. Diagnosing this issue involves checking the door latch for proper operation, examining the wiring for damage, and verifying the BCM’s functionality. Overall, understanding DTC B108C is vital for maintaining your vehicle’s electrical integrity and ensuring a seamless driving experience.

System: B - Body (Airbags, Lighting, Security, Climate Control)

Symptoms

Common symptoms when B108C is present:

  • The check engine light illuminates and remains on, indicating a fault in the body control system.
  • Power door locks may not respond correctly, either failing to lock or unlock the doors, causing inconvenience.
  • Interior lights do not illuminate when the driver’s door is opened, which can be a nuisance at night.
  • Malfunctions in other electrical features, such as window controls or alarm systems, which may also be affected.
  • Inconsistent operation of the vehicle’s security system, potentially leading to difficulties in starting the engine.

Possible Causes

Most common causes of B108C (ordered by frequency):

  1. The most common cause of B108C is a faulty driver's door latch position sensor, which has a likelihood of around 70%. This sensor detects whether the door is open or closed and communicates this to the BCM.
  2. Wiring issues such as frayed wires or poor connections can also trigger this code, accounting for about 20% of cases. Checking the wiring harness for damage is crucial.
  3. A malfunctioning BCM itself could cause the B108C code, although this is less common, occurring in about 5% of instances. If the BCM is faulty, it may require reprogramming or replacement.
  4. Less commonly, environmental factors such as moisture or corrosion can damage the sensor or wiring, affecting functionality.
  5. In rare cases, a software glitch within the BCM may trigger this code, necessitating an update or reprogramming by a professional.

B108C Repair Costs

Cost Breakdown by Repair Type

Driver's Door Latch Position Sensor Replacement

Replacing the faulty latch position sensor usually resolves the B108C code effectively.

  • Total: $150 - $300
  • Success rate: 90%
BCM Reprogramming

In some cases, reprogramming the BCM may resolve the code if no hardware faults are found.

  • Total: $100 - $200
  • Success rate: 75%
Money-Saving Tips for B108C
  • 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 B108C Diagnosis Process

Follow these systematic steps to accurately diagnose B108C. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Perform an initial visual inspection of the driver's door latch and wiring connections for any visible damage or corrosion (5-10 minutes)

Step 1: Perform an initial visual inspection of the driver's door latch and wiring connections for any visible damage or corrosion (5-10 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 2: Step 2: Use the GeekOBD APP to read all stored codes and freeze frame data, which provides context for the B108C code (10-15 minutes)

Step 2: Use the GeekOBD APP to read all stored codes and freeze frame data, which provides context for the B108C code (10-15 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 3: Step 3: Test the driver's door latch position sensor with a multimeter to ensure it operates within the expected parameters (20-30 minutes)

Step 3: Test the driver's door latch position sensor with a multimeter to ensure it operates within the expected parameters (20-30 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 4: Step 4: Conduct a system function test by cycling the door open and closed, and checking BCM responses after any repairs (10-15 minutes)

Step 4: Conduct a system function test by cycling the door open and closed, and checking BCM responses after any repairs (10-15 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 5: Step 5: Go for a road test under various conditions to ensure all electrical systems are functioning correctly post-repair (15-20 minutes)

Step 5: Go for a road test under various conditions to ensure all electrical systems are functioning correctly post-repair (15-20 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.

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: Driver's Door Lock Malfunction Resolved

Vehicle: 2020 Ford Explorer, 45,000 miles

Problem: Customer reported that the driver's door would not lock and the interior lights would not turn on when the door was opened.

Diagnosis: After scanning the vehicle with GeekOBD APP, the B108C code was identified. A visual inspection revealed a damaged door latch position sensor.

Solution: Replaced the door latch position sensor and reprogrammed the BCM to ensure proper communication.

Cost: $250 (sensor: $150, labor: $100)

Result: The door locks and interior lights functioned correctly after repair, and the B108C code was cleared.

Case Study 2: BCM Software Update Fixes Multiple Issues

Vehicle: 2018 Lincoln MKX, 30,000 miles

Problem: Customer experienced intermittent failures with the power locks and dashboard lights.

Diagnosis: The GeekOBD APP indicated B108C alongside other codes suggesting electrical malfunctions. Further testing pointed to outdated BCM software.

Solution: Performed a software update on the BCM, which resolved the issues.

Cost: $180 (software update: $80, diagnostic fee: $100)

Result: Post-repair, the customer reported no further issues, and all systems operated normally.

Diagnose B108C

Use GeekOBD APP for professional diagnosis!

  • Real-time data monitoring
  • Advanced diagnostic features
  • Step-by-step repair guidance
  • Professional-grade analysis
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Code Information

Code: B108C
System: Body (Airbags, Lighting, Security, Climate Control)
Severity: MEDIUM
Category: Body Codes