C0B77 - Common Issues in 2015-2020 Ford and Lincoln Vehicles

Quick Answer

C0B77 means: C0B77 indicates a fault in the Vehicle Dynamics Control Module communication.

Fix: Check and replace faulty components Cost: $500 - $1200 Time: 90-180 minutes

Can I drive with C0B77? Immediate attention is recommended to ensure safety features are operational.

Common Questions

What does C0B77 mean and how does it affect my car?

The C0B77 code indicates a communication issue with the Vehicle Dynamics Control Module, which can impact your vehicle's stability and safety features. If this code appears, it's crucial to address it promptly to avoid compromising the vehicle's performance and safety systems.

What are the most common causes of C0B77 and how much does it cost to fix?

Common causes of C0B77 include a faulty Vehicle Dynamics Control Module, damaged wiring, and outdated software. Repair costs can range from $150 for simple repairs to $1200 for module replacement, depending on the specific issue.

Can I drive my car with C0B77 or should I stop immediately?

While you may still drive your vehicle with a C0B77 code, it is not advisable to ignore it. The compromised stability features can pose a safety risk, especially in adverse weather conditions. It's recommended to seek professional diagnosis as soon as possible.

How can I diagnose C0B77 myself using GeekOBD APP?

Using the GeekOBD APP, start by connecting to your vehicle's OBD2 port. Retrieve the trouble codes and examine the freeze frame data to understand the conditions when the code was triggered. Check for other related codes that can provide additional context.

What vehicles are most commonly affected by C0B77?

The C0B77 code frequently appears in models such as the 2017 Ford Fusion, 2019 Lincoln MKZ, and other vehicles from Ford and Lincoln manufactured between 2015 and 2020. Always check for any recalls or Technical Service Bulletins (TSBs) related to your model.

How can I prevent C0B77 from happening again?

To prevent C0B77, regularly inspect and maintain the vehicle's wiring, ensure software updates are performed, and address any electrical system issues promptly. Keeping the vehicle clean and protecting it from moisture can also help reduce wiring problems.

What is C0B77?

The diagnostic trouble code C0B77 indicates a malfunction related to the Vehicle Dynamics Control Module (VDM) or its communication with other systems in the vehicle. This code is often associated with vehicles equipped with advanced driver-assistance systems (ADAS), such as stability control, traction control, and other electronic stability features. The implications of this code can be significant, as it may lead to reduced functionality of safety systems, potentially increasing the risk of accidents in adverse conditions. Additionally, if the C0B77 code is present, you may notice that the check engine light is illuminated, and certain driver assistance features may be disabled. For example, vehicles like the 2017 Ford Fusion or the 2019 Lincoln MKZ are known to trigger this code due to issues in the wiring harness, connectors, or the module itself. If left unresolved, this code can lead to more severe problems, including complete failure of the vehicle’s electronic stability systems, making it crucial for vehicle owners to address it promptly.

System: C - Chassis (ABS, Steering, Suspension)

Symptoms

Common symptoms when C0B77 is present:

  • The check engine light is illuminated, signaling a fault that requires attention.
  • Driver assistance features, such as lane-keeping assist or adaptive cruise control, may become inoperative, impacting driving ease and safety.
  • Vehicle may experience unstable handling or difficulties maintaining traction during adverse weather conditions, leading to a potential safety hazard.
  • Increased fuel consumption may occur due to suboptimal performance of engine systems linked to the VDM.
  • Warning messages may display on the dashboard, providing additional alerts regarding vehicle stability or safety systems.

Possible Causes

Most common causes of C0B77 (ordered by frequency):

  1. The most common cause is a faulty Vehicle Dynamics Control Module, which has a likelihood of around 40%. This may lead to communication errors with other car systems.
  2. Another frequent cause is damaged wiring or connector issues in the harness, which accounts for about 30%. This can occur from wear and tear or exposure to moisture.
  3. A third cause is software glitches or outdated firmware in the Vehicle Dynamics Control Module, which can be resolved with a proper software update.
  4. Less common but serious issues include a failing power supply to the VDM, which can disrupt the entire communication network within the vehicle.
  5. Rarely, physical damage from accidents or improper repairs can lead to persistent C0B77 codes.

C0B77 Repair Costs

Cost Breakdown by Repair Type

Replace Vehicle Dynamics Control Module

Replacing the faulty VDM with a new unit to restore proper functionality.

  • Total: $500 - $1200
  • Success rate: 85%
Repair Wiring Harness

Repairing or replacing damaged wiring or connectors that may cause communication issues.

  • Total: $150 - $400
  • Success rate: 75%
Software Update

Updating the software of the VDM to fix potential glitches.

  • Total: $100 - $200
  • Success rate: 90%
Money-Saving Tips for C0B77
  • 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 C0B77 Diagnosis Process

Follow these systematic steps to accurately diagnose C0B77. 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 around the Vehicle Dynamics Control Module (5-10 minutes)

Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion around the Vehicle Dynamics Control Module (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 and see if other codes are present (10-15 minutes)

Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context and see if other codes are present (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 to test the VDM and its connections for proper voltage and continuity (20-30 minutes)

Step 3: Component testing - Use a multimeter to test the VDM and its connections 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: System function test - After repairs, verify that the VDM and related systems operate correctly and clear the codes (10-15 minutes)

Step 4: System function test - After repairs, verify that the VDM and related systems operate correctly and 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 repair success and ensure that warning lights do not reappear (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and ensure that warning lights do not reappear (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: C0B77 Repair on 2018 Ford Explorer

Vehicle: 2018 Ford Explorer, 45,000 miles

Problem: Customer reported inconsistent handling and illumination of the check engine light.

Diagnosis: The diagnostics revealed a C0B77 code along with a faulty VDM and corroded wiring connections.

Solution: Replaced the Vehicle Dynamics Control Module and repaired the wiring connections.

Cost: $850 (Module: $700, Labor: $150)

Result: Post-repair, vehicle stability and handling improved, with no further issues.

Case Study 2: C0B77 Diagnosis on 2019 Lincoln MKZ

Vehicle: 2019 Lincoln MKZ, 30,000 miles

Problem: Customer experienced a failure of driver assistance features and received a C0B77 code.

Diagnosis: After thorough diagnostics, it was determined that the issue originated from a software glitch in the VDM.

Solution: Performed a software update on the VDM.

Cost: $150 (Software update: $150)

Result: Driver assistance features were restored, and the code did not reappear.

Diagnose C0B77

Use GeekOBD APP for professional diagnosis!

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Code Information

Code: C0B77
System: Chassis (ABS, Steering, Suspension)
Severity: HIGH
Category: Chassis Codes