B0651 - Understanding the Body Control Module Malfunction in 2015-2018 Ford F-150 and Other Models

Quick Answer

B0651 means: B0651 indicates a malfunction related to the body control module.

Fix: Check and replace faulty components Cost: $300 - $800 Time: 90-180 minutes

Can I drive with B0651? Immediate attention is recommended to prevent further electrical issues.

Common Questions

What does B0651 mean and how does it affect my car?

B0651 indicates a malfunction in the body control module, which could affect various electrical components in your vehicle. If left unresolved, it could lead to further issues, impacting your car's safety and functionality.

What are the most common causes of B0651 and how much does it cost to fix?

Common causes include damaged wiring (60% likelihood) and a failing BCM (25%). Repair costs range from $100 for wiring fixes to $300-$800 for BCM replacement.

Can I drive my car with B0651 or should I stop immediately?

While you may be able to drive, it is unsafe to ignore the B0651 code as it can lead to electrical failures. Immediate attention is recommended to ensure all systems function properly.

How can I diagnose B0651 myself using GeekOBD APP?

With the GeekOBD APP, you can scan for DTCs, review freeze frame data, and monitor real-time sensor data to identify issues related to the BCM effectively.

What vehicles are most commonly affected by B0651?

Commonly reported in 2015-2018 Ford F-150 models. Other makes may also experience this code, particularly those with complex electrical systems.

How can I prevent B0651 from happening again?

Regular maintenance checks on wiring, connections, and ensuring that all electrical components are functioning correctly can help prevent future occurrences of B0651.

What is B0651?

The Diagnostic Trouble Code (DTC) B0651 indicates a specific malfunction within the body control module (BCM) of your vehicle. This code is common in models such as the 2015-2018 Ford F-150, but can also appear in various other makes and models. The BCM is responsible for controlling numerous electrical systems in your car, including lights, power windows, and keyless entry. When B0651 is triggered, it typically means there is a communication issue or a fault in the BCM itself. In practical terms, this may lead to malfunctioning electrical components, affecting your vehicle's functionality and safety. If ignored, it can result in further electrical issues, which can escalate repair costs significantly. The code can be triggered by issues such as damaged wiring, corroded connectors, or a failing BCM. It’s crucial to address this code promptly to avoid potential safety hazards and ensure your vehicle operates as intended.

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

Symptoms

Common symptoms when B0651 is present:

  • The check engine light may illuminate and stay on constantly, signaling a fault.
  • Malfunctions in electrical components, such as power windows not operating or interior lights flickering.
  • Decreased functionality of keyless entry systems, making it difficult to unlock or start the vehicle.
  • Unexpected loss of electrical power to components like the radio or dashboard displays, leading to driver distractions.
  • Intermittent issues, where systems may work sporadically, causing confusion during operation.

Possible Causes

Most common causes of B0651 (ordered by frequency):

  1. The most common cause is damaged wiring or connectors related to the BCM, which occurs in about 60% of cases, often due to wear and tear.
  2. A failing body control module itself can cause this code to appear, usually related to internal failures or software issues that affects about 25% of cases.
  3. Corrosion at electrical connectors can lead to poor communication with the BCM, making up approximately 10% of issues. Regular maintenance can help prevent this.
  4. In rare instances, a short circuit in the vehicle's electrical system can trigger B0651, a serious issue that requires immediate diagnostics.
  5. Faulty sensors that communicate with the BCM can also lead to this trouble code, although this is less common.

B0651 Repair Costs

Cost Breakdown by Repair Type

BCM Replacement

Replacing the body control module with a new OEM part.

  • Total: $300 - $800
  • Success rate: 90%
Wiring Repair

Repairing damaged wiring or connectors leading to the BCM.

  • Total: $100 - $300
  • Success rate: 75%
Money-Saving Tips for B0651
  • 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 B0651 Diagnosis Process

Follow these systematic steps to accurately diagnose B0651. 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).

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).

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 multimeter or specific diagnostic tools to test suspected components (20-30 minutes)

Step 3: Component testing - Use multimeter or specific diagnostic tools to test suspected components (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 - 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).

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 vehicle under various conditions to confirm repair success (15-20 minutes)

Step 5: Road test verification - Drive vehicle under various conditions to confirm repair success (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: BCM Replacement on 2016 Ford F-150

Vehicle: 2016 Ford F-150, 45,000 miles

Problem: Driver reported that the keyless entry system stopped working and the check engine light was on.

Diagnosis: After scanning with the GeekOBD APP, B0651 was confirmed. Visual inspection showed corroded connectors.

Solution: Replaced the BCM and cleaned all connections.

Cost: $600 (BCM $400, labor $200)

Result: All systems returned to normal functionality, and the check engine light was cleared.

Case Study 2: Wiring Repair on 2018 Chevrolet Silverado

Vehicle: 2018 Chevrolet Silverado, 30,000 miles

Problem: Driver noted intermittent electrical issues and flickering dashboard lights.

Diagnosis: DTC B0651 appeared. Inspection revealed damaged wiring harness near the BCM.

Solution: Repaired the damaged wiring and secured all connections.

Cost: $150 (labor $100, parts $50)

Result: Electrical issues resolved with no further complaints.

Diagnose B0651

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: B0651
System: Body (Airbags, Lighting, Security, Climate Control)
Severity: HIGH
Category: Body Codes