B0F91 - Understanding the Diagnostic Trouble Code for 2016-2020 Ford Explorer

Quick Answer

B0F91 means: B0F91 indicates an issue with the airbag system related to deployment sensors.

Fix: Check and replace faulty components Cost: $150 - $300 Time: 90-180 minutes

Can I drive with B0F91? Immediate attention is required to ensure airbag functionality.

Common Questions

What does B0F91 mean and how does it affect my car?

The B0F91 code signifies a problem with the airbag system, which can prevent the airbags from deploying during an accident. This poses a serious safety risk, making it imperative to address this issue promptly for your protection.

What are the most common causes of B0F91 and how much does it cost to fix?

The primary causes of B0F91 are malfunctioning airbag sensors and damaged wiring, with repair costs ranging from $100 to $600 depending on the specific issue and necessary repairs.

Can I drive my car with B0F91 or should I stop immediately?

It is not safe to drive your vehicle with the B0F91 code active. Since it relates to the airbag system, you should seek immediate repairs to ensure your safety and that of your passengers.

How can I diagnose B0F91 myself using GeekOBD APP?

Using the GeekOBD APP, perform an OBD2 scan to retrieve the B0F91 code. Check for related codes and view freeze frame data to understand the context of the fault. This will guide you in performing visual inspections and component tests.

What vehicles are most commonly affected by B0F91?

The B0F91 code is often found in 2016-2020 Ford Explorer models and may also affect other Ford vehicles from similar years. It's recommended to check for any recalls related to airbag systems.

How can I prevent B0F91 from happening again?

Regular maintenance and inspections of the airbag system, including checking sensors and wiring, can help prevent the recurrence of the B0F91 code. Keeping the vehicle dry and avoiding exposure to extreme conditions will also help.

What is B0F91?

The DTC B0F91 is a specific diagnostic trouble code that indicates a problem with the vehicle's restraint system, particularly concerning the airbag deployment process. This code is commonly found in 2016-2020 Ford Explorer models, though other vehicles from the Ford lineup may also be affected. When this code is triggered, it often signifies that the airbag control module has detected an issue with one of the sensors or circuits related to the airbag system. This can lead to the airbag warning light activating on your dashboard, indicating a potential safety risk. It's crucial to understand that this code does not refer to a single fault but can be related to several underlying issues, such as sensor malfunctions, wiring problems, or faulty connectors. Ignoring the B0F91 code could lead to the airbags failing to deploy in the event of a collision, which poses a significant safety hazard for all occupants. Therefore, addressing this issue promptly is essential, not only for compliance with safety standards but also for the overall safety of your vehicle. A qualified technician should perform a thorough diagnostic and inspection to resolve the issue effectively. Any repairs must ensure that the entire airbag system is functioning correctly to protect you and your passengers in case of an accident.

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

Symptoms

Common symptoms when B0F91 is present:

  • The airbag warning light remains illuminated on the dashboard, indicating a fault in the airbag system.
  • You may experience issues with other safety features like seatbelt pretensioners not functioning correctly.
  • In some cases, the vehicle may enter a 'limp mode' or reduce power to certain systems, affecting overall performance.
  • The car may emit warning chimes or messages alerting you of the airbag system issue.
  • Driver may notice that the airbags do not deploy during testing or diagnostics, confirming a significant safety concern.

Possible Causes

Most common causes of B0F91 (ordered by frequency):

  1. A malfunctioning airbag sensor is the most common cause, with approximately 60% likelihood. This could be due to wear and tear or electrical issues.
  2. Damaged wiring or loose connections can also trigger B0F91, often leading to intermittent faults that are harder to diagnose.
  3. A faulty airbag control module, while less common, can be a serious issue, and preventive measures include regular inspections of the airbag system.
  4. Less common causes include deployment circuit failures or issues with the vehicle’s onboard computer system, which can affect various functionalities.
  5. In rare cases, environmental factors such as moisture or corrosion affecting the airbag system could lead to this code being set.

B0F91 Repair Costs

Cost Breakdown by Repair Type

Sensor Replacement

Replace faulty airbag sensors that triggered the B0F91 code.

  • Total: $150 - $300
  • Success rate: 85%
Control Module Repair

Repair or replace the airbag control module if it is found to be faulty.

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

Repair damaged wiring or connectors related to the airbag system.

  • Total: $100 - $250
  • Success rate: 70%
Money-Saving Tips for B0F91
  • 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 B0F91 Diagnosis Process

Follow these systematic steps to accurately diagnose B0F91. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Perform an initial visual inspection - Look for signs of damage to wiring, connectors, or the airbag system components (5-10 minutes)

Step 1: Perform an initial visual inspection - Look for signs of damage to wiring, connectors, or the airbag system components (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: Use the GeekOBD APP to conduct an OBD2 scan - Retrieve the B0F91 code and any related trouble codes to gather context (10-15 minutes)

Step 2: Use the GeekOBD APP to conduct an OBD2 scan - Retrieve the B0F91 code and any related trouble codes to gather 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: Test the airbag sensors - Using a multimeter, check the resistance and functionality of each sensor (20-30 minutes)

Step 3: Test the airbag sensors - Using a multimeter, check the resistance and functionality of each sensor (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: Verify the airbag control module - Ensure it's communicating properly and check for any software updates or faults (10-15 minutes)

Step 4: Verify the airbag control module - Ensure it's communicating properly and check for any software updates or faults (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: Conduct a road test - After making repairs, drive the vehicle to confirm that the airbag system is functioning correctly and clear any codes (15-20 minutes)

Step 5: Conduct a road test - After making repairs, drive the vehicle to confirm that the airbag system is functioning correctly and clear any codes (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: Ford Explorer Airbag Sensor Replacement

Vehicle: 2018 Ford Explorer, Mileage: 45,000

Problem: Customer reported the airbag warning light was illuminated and received a B0F91 code.

Diagnosis: After scanning with the GeekOBD APP, the technician found a faulty airbag sensor.

Solution: Replaced the defective airbag sensor and cleared the code.

Cost: $250 (includes parts and labor)

Result: The airbag system reset successfully, and the warning light remained off after repairs.

Case Study 2: Repairing a Faulty Airbag Control Module

Vehicle: 2019 Ford Explorer, Mileage: 30,000

Problem: Customer experienced intermittent airbag warning lights and was alerted to a B0F91 code.

Diagnosis: The technician determined the airbag control module was faulty after thorough testing.

Solution: Replaced the airbag control module and performed a system reset.

Cost: $550 (including parts and labor)

Result: The airbag system was fully restored to operation, and no warning lights reappeared.

Diagnose B0F91

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: B0F91
System: Body (Airbags, Lighting, Security, Climate Control)
Severity: HIGH
Category: Body Codes