B0672 - Understanding the Body Control Module Malfunction in Ford and Lincoln Vehicles

Quick Answer

B0672 means: B0672 indicates a malfunction in the left rear window switch circuit, often linked to the body control module.

Fix: Check and replace faulty components Cost: $80 - $150 Time: 90-180 minutes

Can I drive with B0672? Address this issue promptly to avoid further electrical problems.

Common Questions

What does B0672 mean and how does it affect my car?

The B0672 code indicates a problem with the left rear window switch circuit, potentially leading to your window not functioning. This can cause inconvenience and affect the overall electrical system of your vehicle, requiring prompt attention to ensure safety and functionality.

What are the most common causes of B0672 and how much does it cost to fix?

Common causes of B0672 include a faulty left rear window switch, a defective body control module, and wiring issues. Repair costs can range from $80 for a switch replacement to $600 for a BCM replacement, depending on the issue's severity.

Can I drive my car with B0672 or should I stop immediately?

While you can drive with B0672, it is advised to address the issue promptly. Ignoring it may lead to more extensive electrical problems, affecting your vehicle’s overall performance and safety.

How can I diagnose B0672 myself using GeekOBD APP?

Using the GeekOBD APP, you can scan for diagnostic trouble codes and view freeze frame data. This will provide insights into when the B0672 code was triggered and help guide you in troubleshooting the left rear window switch or BCM.

What vehicles are most commonly affected by B0672?

B0672 is commonly found in Ford vehicles, especially models like the Ford Fusion (2013-2018) and Lincoln MKZ (2014-2018). It's advisable to check for any recalls or technical service bulletins related to electrical issues with these models.

How can I prevent B0672 from happening again?

To prevent B0672 from reoccurring, regularly inspect the electrical components related to the body control module, keep the interior dry to avoid water intrusion, and promptly address any signs of electrical issues.

What is B0672?

The diagnostic trouble code B0672 indicates an issue with the body control module (BCM) in your vehicle, specifically related to the left rear window switch circuit. This code is commonly associated with various Ford and Lincoln models, particularly those manufactured between 2010 and 2018. When the BCM detects that the left rear window switch is malfunctioning, it triggers this code to alert you. The body control module is a crucial component responsible for managing various electrical systems, including windows, locks, and interior lights. If the BCM cannot receive the correct signals from the left rear window switch, it may lead to the window not operating properly, causing inconvenience and potential safety concerns. In real-world terms, if you notice your left rear window won't roll up or down, the B0672 code may be the culprit. Ignoring this code can lead to further electrical issues within the vehicle, making it essential to address it promptly. Regular maintenance and timely repairs can prevent more severe problems down the line, ensuring a safer and more reliable driving experience.

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

Symptoms

Common symptoms when B0672 is present:

  • The left rear window does not respond when the switch is pressed, indicating a potential failure in the circuit.
  • The interior lights may flicker or fail to illuminate, suggesting a broader issue with the BCM.
  • You may experience intermittent issues with other electrical components, such as door locks or mirrors.
  • In some cases, the check engine light may activate alongside code B0672, signaling additional problems.
  • Unexpected battery drain could occur if the BCM continually tries to communicate with a faulty switch.

Possible Causes

Most common causes of B0672 (ordered by frequency):

  1. The most common cause is a faulty left rear window switch, with a likelihood of 60%. This can be due to wear and tear or moisture damage.
  2. A defective body control module itself is the second most common cause, accounting for about 25%. This can happen due to electrical shorts or corrosion.
  3. Wiring issues in the left rear window circuit, such as frayed wires or poor connections, may also trigger this code (10% likelihood). Regular inspections can help prevent this.
  4. Less common but serious causes include water intrusion into the BCM, which can lead to failure of multiple electrical systems.
  5. A rare cause could be a software glitch in the BCM, which may require a software update from the manufacturer.

B0672 Repair Costs

Cost Breakdown by Repair Type

Left Rear Window Switch Replacement

Replacing the faulty window switch with an OEM part.

  • Total: $80 - $150
  • Success rate: 95%
BCM Replacement

Replacing the body control module if it is found defective after diagnostics.

  • Total: $300 - $600
  • Success rate: 90%
Wiring Repair

Repairing or replacing damaged wiring in the left rear window circuit.

  • Total: $50 - $200
  • Success rate: 85%
Money-Saving Tips for B0672
  • 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 B0672 Diagnosis Process

Follow these systematic steps to accurately diagnose B0672. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Initial visual inspection - Check for damaged wiring, loose connections, and corrosion around the left rear window switch and BCM (5-10 minutes)

Step 1: Initial visual inspection - Check for damaged wiring, loose connections, and corrosion around the left rear window switch 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 codes and freeze frame data, which will help provide context for the B0672 code (10-15 minutes)

Step 2: OBD2 scan with GeekOBD APP - Use the app to retrieve all codes and freeze frame data, which will help provide context for the B0672 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: Component testing - Test the left rear window switch and BCM with a multimeter to ensure they are functioning correctly (20-30 minutes)

Step 3: Component testing - Test the left rear window switch and BCM with a multimeter to ensure they are functioning correctly (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 left rear window and other affected systems, then clear the codes (10-15 minutes)

Step 4: System function test - After making repairs, verify the operation of the left rear window and other affected systems, then clear the 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 the vehicle under various conditions to confirm that the issue has been resolved and that no new codes appear (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to confirm that the issue has been resolved and that no new codes appear (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: Repair of B0672 Code in a 2015 Ford Fusion with Window Issues

Vehicle: 2015 Ford Fusion, 75,000 miles

Problem: Customer reported that the left rear window would not operate at all.

Diagnosis: After a thorough scan with the GeekOBD APP, the B0672 code was present. Visual inspection revealed a damaged window switch.

Solution: Replaced the faulty left rear window switch and cleared the B0672 code.

Cost: $120 (switch cost plus labor)

Result: The window operated correctly after repair, and no further issues were reported.

Case Study 2: Resolving B0672 Code in a 2018 Lincoln MKZ

Vehicle: 2018 Lincoln MKZ, 40,000 miles

Problem: Customer experienced intermittent window functionality and dashboard warnings.

Diagnosis: Diagnostic tests indicated a malfunctioning body control module upon further inspection.

Solution: Replaced the body control module and reprogrammed it to sync with the vehicle's systems.

Cost: $450 (including BCM and programming costs)

Result: All electrical systems operated normally post-repair, and the customer reported satisfaction with the solution.

Diagnose B0672

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: B0672
System: Body (Airbags, Lighting, Security, Climate Control)
Severity: MEDIUM
Category: Body Codes