B4007 - Body Control Module Communication Error in 2015-2020 Ford F-150 and Other Models

Quick Answer

B4007 means: The B4007 code indicates a communication error between the Body Control Module and other vehicle systems.

Fix: Check and replace faulty components Cost: $300 - $700 Time: 90-180 minutes

Can I drive with B4007? Address this issue as soon as possible to avoid further complications and ensure vehicle safety.

Common Questions

What does B4007 mean and how does it affect my car?

The B4007 code signifies a communication error between the Body Control Module and other systems in your vehicle. This can lead to various electrical issues, such as malfunctioning lights, door locks, and other critical features, potentially impacting your vehicle's performance and safety.

What are the most common causes of B4007 and how much does it cost to fix?

Common causes include a faulty Body Control Module, damaged wiring, or blown fuses. Repair costs generally range from $100 for wiring repairs to upwards of $700 for module replacement, depending on the specific issue.

Can I drive my car with B4007 or should I stop immediately?

While you may still be able to drive your vehicle, it is advisable to address the B4007 code as soon as possible. Continuing to drive with this issue can lead to further electrical problems and may compromise your vehicle’s safety features.

How can I diagnose B4007 myself using GeekOBD APP?

Using the GeekOBD APP, you can scan for DTCs, view freeze frame data, and monitor live parameters to understand the communication issues better. Follow the app's prompts to identify any related codes and track down potential wiring or module issues.

What vehicles are most commonly affected by B4007?

The B4007 code is frequently reported in 2015-2020 Ford F-150 models and select Chevrolet Silverado vehicles. If you own one of these vehicles, be proactive about checking for this code, especially if you notice electrical problems.

How can I prevent B4007 from happening again?

Regular maintenance is key. Ensure that your vehicle's electrical system is inspected during routine services. Look for signs of wear in wiring and connectors and consider using protective sprays to reduce corrosion.

What is B4007?

The B4007 diagnostic trouble code (DTC) indicates a communication error between the Body Control Module (BCM) and other modules within your vehicle's network. This code can trigger in various vehicles, but it's particularly common in models like the 2015-2020 Ford F-150 and certain Chevrolet Silverado models. When this code appears, it signifies that the BCM is not receiving or sending data properly, which can lead to numerous electrical issues. The BCM controls various functions, including lighting, door locks, and security systems. If the communication is interrupted, you might experience symptoms such as the failure of electrical components or erratic operation of vehicle features. Ignoring this code can lead to further complications, as persistent communication errors may cause the BCM to fail entirely or affect other modules, leading to increased repair costs in the long run. It's crucial to address this issue promptly to maintain vehicle functionality and safety.

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

Symptoms

Common symptoms when B4007 is present:

  • The check engine light illuminates, often accompanied by other warning lights.
  • Electrical components, such as power windows or door locks, may function intermittently or not at all, leaving you frustrated.
  • You may experience erratic behavior in the vehicle's lighting system, with headlights flickering or dashboard lights dimming unexpectedly.
  • The vehicle’s security system might malfunction, leading to difficulties in starting the vehicle or activating the alarm.
  • In some cases, the vehicle may exhibit poor fuel economy due to the BCM not properly managing electrical loads.

Possible Causes

Most common causes of B4007 (ordered by frequency):

  1. The most common cause of a B4007 code is a faulty Body Control Module, with a likelihood of approximately 50%. If the BCM is damaged or malfunctioning, it may fail to communicate with other modules effectively.
  2. Another frequent cause is damaged wiring or connectors, which can affect data transmission. Corrosion or frayed wires may lead to intermittent signals.
  3. A blown fuse or poor ground can also trigger this code, impacting the BCM's ability to process information and communicate with other systems.
  4. Less common but serious causes include short circuits within the vehicle's electrical system that can lead to extensive damage if not addressed promptly.
  5. In rare cases, software issues within the BCM can also lead to communication failures, requiring reprogramming or replacement for resolution.

B4007 Repair Costs

Cost Breakdown by Repair Type

Body Control Module Replacement

Replacing the Body Control Module with a new or refurbished unit.

  • Total: $300 - $700
  • Success rate: 85%
Wiring and Connector Repair

Repairing or replacing damaged wiring and connectors that affect communication.

  • Total: $100 - $300
  • Success rate: 90%
Software Update/Reprogramming

Updating or reprogramming the Body Control Module software.

  • Total: $50 - $150
  • Success rate: 75%
Money-Saving Tips for B4007
  • 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 B4007 Diagnosis Process

Follow these systematic steps to accurately diagnose B4007. 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 (5-10 minutes)

Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion (5-10 minutes). Look for any visible issues around the BCM and associated connectors.

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 - Retrieve all codes and freeze frame data to understand the fault context (10-15 minutes)

Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context (10-15 minutes). This step helps in identifying if there are any additional related codes.

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 - Use a multimeter to test the voltage and continuity on the BCM and its connections (20-30 minutes)

Step 3: Component testing - Use a multimeter to test the voltage and continuity on the BCM and its connections (20-30 minutes). Ensure that the BCM is receiving power and that ground connections are secure.

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 - Verify proper operation after repairs and clear codes (10-15 minutes)

Step 4: System function test - Verify proper operation after repairs and clear codes (10-15 minutes). Check if all electrical components controlled by the BCM are functioning as intended.

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 confirm repair success (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success (15-20 minutes). Monitor for any reoccurrence of the B4007 code or related symptoms.

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: BCM Replacement on a 2018 Ford F-150

Vehicle: 2018 Ford F-150 Lariat, 45,000 miles

Problem: Customer reported intermittent power window failure and dashboard warning lights.

Diagnosis: Upon scanning with GeekOBD APP, B4007 was detected alongside other related codes. Visual inspection revealed corroded connectors.

Solution: The BCM was replaced, and connectors were cleaned and secured. A software update was performed post-repair.

Cost: $550 (parts: $400 for BCM, $150 for labor)

Result: All electrical functions returned to normal, and the customer reported no further issues.

Case Study 2: Wiring Repair on a 2016 Chevrolet Silverado

Vehicle: 2016 Chevrolet Silverado 1500, 60,000 miles

Problem: Customer experienced erratic lighting and difficulty with locking doors.

Diagnosis: The B4007 code was present. A thorough inspection found damaged wiring near the BCM.

Solution: Wiring was repaired, and connections were reinforced to ensure reliability.

Cost: $250 (parts: $50 for wiring, $200 for labor)

Result: Post-repair, the vehicle's electrical systems functioned properly without further issues.

Diagnose B4007

Use GeekOBD APP for professional diagnosis!

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  • Step-by-step repair guidance
  • Professional-grade analysis
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Code Information

Code: B4007
System: Body (Airbags, Lighting, Security, Climate Control)
Severity: HIGH
Category: Body Codes