B0C79 - Understanding DTC B0C79: What You Need to Know for Your 2015-2020 Ford F-150

Quick Answer

B0C79 means: B0C79 indicates a fault in the vehicle's battery voltage monitoring system.

Fix: Check and replace faulty components Cost: $100 - $250 Time: 90-180 minutes

Can I drive with B0C79? Immediate attention is recommended to prevent further electrical issues.

Common Questions

What does B0C79 mean and how does it affect my car?

The B0C79 code indicates an issue with the battery voltage monitoring system. This can lead to various electrical problems, including difficulty starting your vehicle and erratic electrical behavior. Addressing this code is crucial to maintaining vehicle safety and performance.

What are the most common causes of B0C79 and how much does it cost to fix?

Common causes include a failing battery (approximately $100-$250), damaged wiring (around $50-$150), or a malfunctioning body control module (costing $300-$600). Regular diagnostics can help identify these issues early.

Can I drive my car with B0C79 or should I stop immediately?

It's advisable to stop driving your vehicle if the B0C79 code appears. Ignoring it can lead to more severe electrical problems, which could leave you stranded or cause unsafe driving conditions.

How can I diagnose B0C79 myself using GeekOBD APP?

You can use the GeekOBD APP to scan for diagnostic trouble codes and view freeze-frame data. Check the battery voltage readings and look for any additional codes that may provide context for the B0C79.

What vehicles are most commonly affected by B0C79?

The B0C79 code is commonly found in the 2015-2020 Ford F-150, but it can also appear in other Ford models from similar years. Regularly checking for recalls or TSBs related to electrical systems is advised.

How can I prevent B0C79 from happening again?

Regular maintenance of your vehicle's electrical system, including battery checks and inspections of wiring connections, can help prevent the B0C79 code from reoccurring. Additionally, using quality parts and keeping your vehicle clean can mitigate corrosion.

What is B0C79?

DTC B0C79 is a diagnostic trouble code that indicates a problem with the vehicle's control module, specifically related to the battery voltage monitoring system. This code is particularly prevalent in models like the 2015-2020 Ford F-150 and can lead to various electrical issues. When the B0C79 code is triggered, it typically means that the body control module has detected a fault in the battery or electrical system. This could be due to low voltage, a failing battery, or issues with the wiring that connects the battery to the control module. If left unaddressed, this can result in symptoms such as erratic electrical behavior, difficulty starting the vehicle, or even complete electrical failure. It's essential to recognize that while the check engine light may illuminate, this code signifies a more pressing issue that could affect vehicle safety and performance. Regular diagnostics using tools like the GeekOBD APP can help catch these issues early, making it crucial for owners to remain vigilant and proactive about their vehicle's electrical health. Ignoring this code could lead to more expensive repairs down the line as further electrical components may become compromised.

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

Symptoms

Common symptoms when B0C79 is present:

  • The check engine light remains illuminated, indicating a potential issue with the vehicle's electrical system.
  • Electrical components may behave erratically, such as flickering lights or intermittent power loss, leading to driver frustration.
  • You might notice a significant decrease in fuel economy, potentially by 10-15%, due to the vehicle's electrical systems drawing excessive power.
  • Starting the vehicle may become a challenge, with slow cranking or complete failure to start.
  • In extreme cases, the vehicle could experience complete electrical failure, leaving you stranded.

Possible Causes

Most common causes of B0C79 (ordered by frequency):

  1. The most common cause of the B0C79 code is a weak or failing battery, which accounts for about 60% of cases. A battery that cannot hold a charge will affect the entire electrical system.
  2. Another common cause is damaged wiring or connectors, where corrosion or physical damage disrupts the electrical flow. This is often found in vehicles that have been exposed to harsh conditions.
  3. A less frequent but serious cause may involve a malfunctioning body control module (BCM) itself. If the BCM is faulty, it may incorrectly interpret voltage levels.
  4. Rarely, an issue with the alternator can trigger this code, especially if the alternator is not charging the battery adequately.
  5. In some cases, software glitches within the vehicle’s control systems can also trigger the B0C79 code, which may require a firmware update.

B0C79 Repair Costs

Cost Breakdown by Repair Type

Battery Replacement

Replacing a weak or failing battery can resolve the B0C79 code effectively.

  • Total: $100 - $250
  • Success rate: 90%
Wiring Repair

Repairing or replacing damaged wiring or connectors ensures proper electrical flow.

  • Total: $50 - $150
  • Success rate: 85%
BCM Replacement

If the body control module is faulty, replacing it will restore proper function.

  • Total: $300 - $600
  • Success rate: 75%
Money-Saving Tips for B0C79
  • 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 B0C79 Diagnosis Process

Follow these systematic steps to accurately diagnose B0C79. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Begin with an initial visual inspection of the battery and associated wiring

Step 1: Begin with an initial visual inspection of the battery and associated wiring. Look for any signs of corrosion, loose connections, or frayed wires (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 perform an OBD2 scan

Step 2: Use the GeekOBD APP to perform an OBD2 scan. Retrieve all trouble codes and check freeze-frame data to understand the context of the fault (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: Conduct component testing on the battery and alternator using a multimeter

Step 3: Conduct component testing on the battery and alternator using a multimeter. Check the voltage output to ensure it's within the correct range (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: Perform a system function test after any repairs

Step 4: Perform a system function test after any repairs. Clear the codes using the GeekOBD APP and verify that the issue does not recur (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 the vehicle under various conditions to ensure that the B0C79 code does not reappear, confirming that all systems are functioning correctly (15-20 minutes)

Step 5: Road test the vehicle under various conditions to ensure that the B0C79 code does not reappear, confirming that all systems are functioning correctly (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: Battery Replacement for B0C79 in 2018 Ford F-150

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

Problem: Customer complained of intermittent electrical issues and a check engine light.

Diagnosis: After scanning with GeekOBD APP, the B0C79 code was confirmed along with low battery voltage readings.

Solution: Replaced the old battery with a new, high-quality battery.

Cost: $200 (parts: $150, labor: $50)

Result: The check engine light was cleared, and the vehicle's electrical systems functioned normally after the repair.

Case Study 2: Wiring Repair for B0C79 in 2019 Ford Explorer

Vehicle: 2019 Ford Explorer, 30,000 miles

Problem: Driver reported flickering lights and difficulty starting.

Diagnosis: Diagnostic testing revealed damaged wiring that was causing voltage drops.

Solution: Repaired the damaged wiring and secured all connections.

Cost: $120 (parts: $20, labor: $100)

Result: The electrical issues were resolved, and no further codes appeared after testing.

Diagnose B0C79

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: B0C79
System: Body (Airbags, Lighting, Security, Climate Control)
Severity: HIGH
Category: Body Codes