B0559 - Body Control Module (BCM) Malfunction in Common Vehicles Like Ford and Chevy

Quick Answer

B0559 means: B0559 indicates a malfunction in the Body Control Module.

Fix: Check and replace faulty components Cost: $300 - $600 Time: 90-180 minutes

Can I drive with B0559? Immediate attention is recommended to prevent further electrical issues.

Common Questions

What does B0559 mean and how does it affect my car?

The B0559 code indicates a malfunction in the Body Control Module, which is responsible for controlling various functions in your vehicle. If this issue arises, you may experience problems with your vehicle's lights, power accessories, and security system. This can lead to significant inconveniences and potential safety risks if not addressed promptly.

What are the most common causes of B0559 and how much does it cost to fix?

Common causes of B0559 include a faulty BCM, damaged wiring, and corrosion in connectors. Repair costs can range from $100 for wiring repairs to $600 for a complete BCM replacement, depending on the complexity of the issue.

Can I drive my car with B0559 or should I stop immediately?

While you may be able to drive your car, it is not advisable to ignore the B0559 code. Driving with a malfunctioning BCM can lead to further electrical problems, which may compromise your safety. It's best to have it diagnosed and repaired as soon as possible.

How can I diagnose B0559 myself using GeekOBD APP?

First, connect the GeekOBD device to your vehicle's OBD2 port and open the app. Use the app to scan for codes and view freeze-frame data. Pay attention to any other codes that might be present, as they can provide additional context for the B0559 code. Check the BCM connections and perform visual inspections following the app's guidance.

What vehicles are most commonly affected by B0559?

Vehicles like the 2010-2015 Ford Fusion, 2007-2014 Chevy Malibu, and various models from other manufacturers are frequently affected by B0559. It's also wise to check for any recalls or Technical Service Bulletins (TSBs) that may be related to BCM issues in your vehicle.

How can I prevent B0559 from happening again?

Regular maintenance is key to preventing B0559. Keep your vehicle’s electrical system clean and dry, inspect wiring and connectors periodically, and ensure that your BCM software is updated. Using a protective cover during harsh weather can also help prevent water ingress.

What is B0559?

The Diagnostic Trouble Code (DTC) B0559 refers to a malfunction in the Body Control Module (BCM), a crucial electronic component in modern vehicles. This code is commonly triggered in vehicles like the 2010-2015 Ford Fusion and the 2007-2014 Chevy Malibu. The BCM is responsible for controlling various body functions such as lighting, power windows, and security systems. When the BCM detects an internal error or a failure in communication with other modules, it triggers the B0559 code. This malfunction can lead to a range of issues including inoperative lighting, problems with power accessories, or even failure of the vehicle's security system. If left unaddressed, a malfunctioning BCM could lead to more significant electrical issues or safety concerns, making it essential to diagnose and repair this code promptly. The symptoms can vary significantly, affecting the vehicle's overall functionality and user experience. Always consult a qualified technician to ensure a thorough diagnosis and appropriate repairs.

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

Symptoms

Common symptoms when B0559 is present:

  • The check engine light illuminates and remains on, indicating a potential issue with the vehicle's electrical system.
  • Power windows may fail to operate, causing inconvenience and safety risks if a window is left down.
  • Interior and exterior lights may flicker or remain off, leading to visibility issues during nighttime driving.
  • The vehicle's remote keyless entry system may not function properly, resulting in difficulties locking or unlocking the doors.
  • Erratic behavior of dashboard indicators and warning lights, which can mislead the driver about the vehicle's condition.

Possible Causes

Most common causes of B0559 (ordered by frequency):

  1. The most common cause is a faulty Body Control Module itself, with a likelihood of around 60%. This could be due to internal component failure or software issues.
  2. Another common issue is damaged wiring or connectors, which can lead to poor communication between the BCM and other vehicle systems. This has a likelihood of about 25%.
  3. Corrosion or water ingress in the BCM connectors is another concern, especially in vehicles exposed to harsh weather conditions. Prevention involves regular inspections and ensuring proper sealing.
  4. Less common but serious causes include a short circuit in the wiring harness, which could lead to a complete failure of the vehicle's electrical systems.
  5. A rare cause could be software glitches in the BCM that may require a reprogramming or update to resolve the issue.

B0559 Repair Costs

Cost Breakdown by Repair Type

BCM Replacement

Replacing the faulty Body Control Module with a new or refurbished unit.

  • Total: $300 - $600
  • Success rate: 85%
Wiring Repair

Repairing damaged wiring or connectors associated with the BCM.

  • Total: $100 - $250
  • Success rate: 75%
Software Update

Reprogramming or updating the BCM software to fix glitches.

  • Total: $50 - $150
  • Success rate: 90%
Money-Saving Tips for B0559
  • 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 B0559 Diagnosis Process

Follow these systematic steps to accurately diagnose B0559. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Begin with a visual inspection of the BCM and its wiring

Step 1: Begin with a visual inspection of the BCM and its wiring. Look for any signs of physical damage, loose connections, or corrosion that could affect operation (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 stored codes and freeze-frame data to provide context for the B0559 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: Conduct component testing with a multimeter to assess the BCM and its associated circuits for proper voltage and continuity (20-30 minutes)

Step 3: Conduct component testing with a multimeter to assess the BCM and its associated circuits for proper voltage and continuity (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: After any repairs, perform a system function test to ensure the BCM and related components are functioning correctly

Step 4: After any repairs, perform a system function test to ensure the BCM and related components are functioning correctly. Clear the codes and monitor for reoccurrence (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: Finally, conduct a road test under various conditions to confirm that the repairs have resolved the B0559 issue (15-20 minutes)

Step 5: Finally, conduct a road test under various conditions to confirm that the repairs have resolved the B0559 issue (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 in a 2012 Ford Fusion

Vehicle: 2012 Ford Fusion, 85,000 miles

Problem: The owner reported that the interior lights would not turn off and the power windows stopped working intermittently.

Diagnosis: After scanning with the GeekOBD APP, B0559 was confirmed along with a few other codes related to the BCM. A visual inspection showed corroded connections.

Solution: The BCM was replaced, and all connections were cleaned and secured.

Cost: $450 (BCM $350, labor $100)

Result: Post-repair, all systems functioned as expected with no reoccurrence of the code.

Case Study 2: Wiring Repair in a 2014 Chevy Malibu

Vehicle: 2014 Chevy Malibu, 70,000 miles

Problem: Customer experienced malfunctioning lights and issues with the remote entry system.

Diagnosis: Diagnostic tests showed B0559, and inspection revealed damaged wiring near the BCM.

Solution: Wiring was repaired and reconnected properly.

Cost: $150 (repair labor)

Result: All systems operated normally, and the B0559 code did not return.

Diagnose B0559

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: B0559
System: Body (Airbags, Lighting, Security, Climate Control)
Severity: HIGH
Category: Body Codes