B0933 - Understanding the Body Control Module Fault in 2015-2019 Ford F-150 Models

Quick Answer

B0933 means: DTC B0933 signifies a fault in the Body Control Module (BCM), affecting vehicle electronics.

Fix: Check and replace faulty components Cost: $100 - $300 Time: 90-180 minutes

Can I drive with B0933? While it may not cause immediate drivability issues, it should be addressed to prevent further electronic failures.

Common Questions

What does B0933 mean and how does it affect my car?

DTC B0933 indicates a problem with the Body Control Module (BCM), which controls various electronic functions in your vehicle. If this code appears, you might experience issues like unresponsive power windows or flickering lights. While it may not affect engine performance, it can lead to significant inconveniences and potential safety issues if not addressed.

What are the most common causes of B0933 and how much does it cost to fix?

Common causes of B0933 include faulty wiring (50% likelihood), software glitches in the BCM, or poor battery connections. Repair costs can range from $75 for reprogramming to $800 for a complete module replacement, depending on the underlying issue.

Can I drive my car with B0933 or should I stop immediately?

You can drive your vehicle with DTC B0933, but it's advisable to address the issue soon. Ignoring it may lead to further electronic failures or more costly repairs in the future, especially if critical systems are affected.

How can I diagnose B0933 myself using GeekOBD APP?

To diagnose B0933 using the GeekOBD APP, start by connecting the app to your vehicle's OBD2 port. Run a complete scan to retrieve the DTC and any related codes. Check the freeze frame data for symptoms and take note of any other electrical issues before proceeding with further diagnostics.

What vehicles are most commonly affected by B0933?

DTC B0933 is commonly seen in 2015-2019 Ford F-150 models. Other vehicles from the Ford lineup, including certain Explorers and Mustangs from those years, may also exhibit similar issues, particularly if they have undergone modifications or have high mileage.

How can I prevent B0933 from happening again?

Regular maintenance is key to preventing DTC B0933. Ensure that your vehicle's electrical systems are inspected during routine check-ups. Keep connections clean and free from corrosion, and consider using a protective spray on exposed wiring to prevent damage from moisture.

What is B0933?

DTC B0933 is a diagnostic trouble code that indicates a fault in the Body Control Module (BCM) of your vehicle. The BCM is responsible for controlling various electronic components in your car, including lighting, power windows, and door locks. When this code is triggered, it usually points to a communication issue between the BCM and other modules in the vehicle. This can manifest as various electronic malfunctions, such as flickering lights, unresponsive windows, or even issues with the ignition system. For example, in a 2017 Ford F-150, drivers might notice that the power windows occasionally fail to operate or that the interior lights do not turn off as expected. While this code may not directly impact engine performance, it can lead to frustrating inconveniences and potential safety hazards if left unaddressed. It's crucial to diagnose and repair the underlying issue promptly to ensure all electronic systems function reliably. Issues can arise from faulty wiring, poor connections, or even software glitches within the BCM. Therefore, understanding and addressing DTC B0933 is essential for maintaining the overall functionality of your vehicle's electronics.

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

Symptoms

Common symptoms when B0933 is present:

  • Check engine light or warning indicators on the dashboard stay illuminated consistently, signaling potential electronic failures.
  • Power windows may intermittently fail to operate, causing inconvenience for drivers and passengers alike.
  • Interior lights flicker or remain on even after the vehicle is turned off, which can drain the battery over time.
  • Doors may not unlock or lock properly using the remote or buttons, leading to security concerns.
  • The vehicle's ignition may exhibit intermittent issues, causing difficulty in starting the engine.

Possible Causes

Most common causes of B0933 (ordered by frequency):

  1. The most common cause of DTC B0933 is faulty wiring or connectors related to the BCM, with a likelihood of about 50%. These issues often arise from corrosion or wear and tear over time.
  2. Another possible cause is a software glitch within the Body Control Module itself. This could result from a recent update or a malfunctioning firmware, which can be addressed by reprogramming the BCM.
  3. Additionally, poor battery connections or a weak battery can lead to communication issues with the BCM, which is often overlooked during routine maintenance.
  4. Less common but serious causes include physical damage to the BCM from water intrusion or accidents, which may require complete module replacement.
  5. In rare cases, aftermarket modifications or installations can interfere with the BCM's operation, leading to the B0933 code being triggered.

B0933 Repair Costs

Cost Breakdown by Repair Type

Wiring and Connector Repair

Repair or replacement of damaged wiring and connectors related to the BCM.

  • Total: $100 - $300
  • Success rate: 85%
BCM Reprogramming

Reprogramming the Body Control Module to resolve software issues.

  • Total: $75 - $150
  • Success rate: 90%
BCM Replacement

Full replacement of the Body Control Module if it is found to be faulty.

  • Total: $400 - $800
  • Success rate: 95%
Money-Saving Tips for B0933
  • 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 B0933 Diagnosis Process

Follow these systematic steps to accurately diagnose B0933. 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 a multimeter or specific diagnostic tools to test suspected components related to the BCM (20-30 minutes)

Step 3: Component testing - Use a multimeter or specific diagnostic tools to test suspected components related to the BCM (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 using the GeekOBD APP (10-15 minutes)

Step 4: System function test - Verify proper operation after repairs and clear codes using the GeekOBD APP (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 repair success and monitor for any reoccurring issues (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and monitor for any reoccurring issues (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: Body Control Module Repair on a 2017 Ford F-150

Vehicle: 2017 Ford F-150, 75,000 miles

Problem: Owner reported intermittent power window failures and flickering interior lights.

Diagnosis: Initial inspection revealed corrosion on the wiring harness connected to the BCM. A diagnostic scan confirmed the B0933 code.

Solution: Replaced the damaged wiring and reprogrammed the BCM to restore functionality.

Cost: $250 (wiring repair: $150, BCM reprogramming: $100)

Result: All electronic functions were restored, and the vehicle operated without issues post-repair.

Case Study 2: BCM Replacement on a 2019 Ford Explorer

Vehicle: 2019 Ford Explorer, 50,000 miles

Problem: Owner experienced issues with door locks and dashboard warnings that would not reset.

Diagnosis: Diagnostic tests showed a persistent B0933 code, with further investigation revealing a faulty BCM.

Solution: Replaced the Body Control Module and reprogrammed it to sync with the vehicle's systems.

Cost: $650 (BCM replacement: $550, reprogramming: $100)

Result: After replacement, all electronic systems functioned properly, resolving the owner's complaints.

Diagnose B0933

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: B0933
System: Body (Airbags, Lighting, Security, Climate Control)
Severity: MEDIUM
Category: Body Codes