B108E - Understanding DTC B108E: Common Issues in 2015-2020 Ford F-150 and Other Models

Quick Answer

B108E means: B108E indicates a malfunction in the driver's door module communication with the body control module.

Fix: Check and replace faulty components Cost: $150 - $400 Time: 90-180 minutes

Can I drive with B108E? Address the issue soon to prevent further electrical problems.

Common Questions

What does B108E mean and how does it affect my car?

B108E indicates a communication issue between the driver's door module and the body control module. This could lead to problems with power windows, door locks, and other electrical systems, affecting your vehicle's functionality and safety.

What are the most common causes of B108E and how much does it cost to fix?

Common causes include a faulty driver's door module, damaged wiring, or poor battery connections. Repair costs can range from $100 for wiring repairs to $400 for module replacements, depending on the issue.

Can I drive my car with B108E or should I stop immediately?

While it may not create immediate safety hazards, it's advisable to address the B108E code as soon as possible to prevent further electrical issues that could affect your vehicle's operation.

How can I diagnose B108E myself using GeekOBD APP?

Use the GeekOBD APP to scan for diagnostic trouble codes. Pay attention to freeze frame data, which can give you context about when the B108E was triggered. Check for other related codes that may indicate additional issues.

What vehicles are most commonly affected by B108E?

Vehicles like the 2015-2020 Ford F-150, Ford Explorer, and certain Dodge models frequently experience the B108E code due to similar body control systems.

How can I prevent B108E from happening again?

Regularly inspect electrical connections and wiring for wear, ensure that door seals are intact to prevent moisture intrusion, and maintain the vehicle's battery health to reduce the risk of electrical issues.

What is B108E?

The Diagnostic Trouble Code (DTC) B108E refers to a specific issue related to the vehicle's body control module (BCM) and typically indicates a fault in the driver's door module or the communication between the door module and the BCM. This code is predominantly found in vehicles like the 2015-2020 Ford F-150, but can also appear in other models from various manufacturers that utilize similar body control systems. The B108E code is triggered when there is a communication error or malfunction in the door's electrical components, such as the window motor, door locks, or interior lights. Drivers may experience symptoms such as non-functioning power windows, malfunctioning door locks, or warning lights on the dashboard. Ignoring this code could lead to more significant electrical issues within the vehicle, affecting not just comfort features but potentially safety components as well. Therefore, understanding the implications of B108E is crucial for maintaining vehicle integrity and ensuring a safe driving experience.

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

Symptoms

Common symptoms when B108E is present:

  • Power windows may not operate, leaving you unable to open or close them with the switch.
  • Malfunctioning door locks can lead to difficulty locking or unlocking the vehicle, both from inside and outside.
  • Dashboard warning lights may illuminate, indicating electrical issues that could affect other systems.
  • Interior lights may not turn on when the door is opened, leading to inconvenience especially at night.
  • Inconsistent operation of power mirrors may occur, where they fail to adjust or respond erratically.

Possible Causes

Most common causes of B108E (ordered by frequency):

  1. A faulty driver's door module is the most common cause, with a likelihood of about 60%. This can occur due to wear and tear over time.
  2. Corroded or damaged wiring connections between the driver's door module and BCM can lead to communication failures, a common issue that may arise from moisture exposure.
  3. A weak battery or poor ground connection can cause intermittent electrical issues, which could trigger the B108E code.
  4. Less commonly, a faulty body control module could be the culprit, leading to widespread electrical failures in the vehicle.
  5. In rare cases, a software glitch in the BCM could trigger the B108E code, necessitating a software update or reprogramming.

B108E Repair Costs

Cost Breakdown by Repair Type

Driver's Door Module Replacement

Replacing the faulty driver's door module to restore proper function.

  • Total: $150 - $400
  • Success rate: 85%
Wiring Repair

Repairing or replacing damaged wiring between the door and BCM.

  • Total: $100 - $250
  • Success rate: 75%
BCM Reprogramming

Updating or reprogramming the body control module to eliminate software glitches.

  • Total: $75 - $150
  • Success rate: 60%
Money-Saving Tips for B108E
  • 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 B108E Diagnosis Process

Follow these systematic steps to accurately diagnose B108E. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Initial visual inspection - Check for damaged wiring, loose connections, or corrosion, particularly around the driver's door and BCM (5-10 minutes)

Step 1: Initial visual inspection - Check for damaged wiring, loose connections, or corrosion, particularly around the driver's door and BCM (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: OBD2 scan with GeekOBD APP - Use the app to retrieve all diagnostic trouble codes and review freeze frame data to understand the fault context (10-15 minutes)

Step 2: OBD2 scan with GeekOBD APP - Use the app to retrieve all diagnostic trouble codes and review freeze frame data to understand the fault context (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: Component testing - Utilize a multimeter to test the driver's door module and related wiring for voltage and continuity (20-30 minutes)

Step 3: Component testing - Utilize a multimeter to test the driver's door module and related wiring for voltage and continuity (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: System function test - After making repairs, verify the operation of the driver's door module and clear the codes to ensure no further issues exist (10-15 minutes)

Step 4: System function test - After making repairs, verify the operation of the driver's door module and clear the codes to ensure no further issues exist (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: Road test verification - Drive the vehicle under various conditions to ensure all systems are functioning correctly and the B108E code does not reappear (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to ensure all systems are functioning correctly and the B108E code does not reappear (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: Failed Driver's Door Module in 2017 Ford F-150

Vehicle: 2017 Ford F-150, 65,000 miles

Problem: Customer reported power windows and locks not functioning.

Diagnosis: Used GeekOBD APP to read the B108E code and performed a visual inspection which revealed a faulty driver's door module.

Solution: Replaced the driver's door module and reprogrammed it for proper operation.

Cost: $350 (including parts and labor)

Result: All functions restored, customer satisfied with quick turnaround.

Case Study 2: Wiring Issues in 2018 Ford Explorer

Vehicle: 2018 Ford Explorer, 45,000 miles

Problem: Customer experienced intermittent power window operation.

Diagnosis: Diagnosed B108E using GeekOBD APP and found corroded wiring connections.

Solution: Repaired wiring connections and ensured proper grounding.

Cost: $150 (parts and labor)

Result: Power windows functioned reliably post-repair.

Diagnose B108E

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: B108E
System: Body (Airbags, Lighting, Security, Climate Control)
Severity: MEDIUM
Category: Body Codes