C07B8 - Body Control Module Communication Error in Ford, Chevrolet, and Dodge Models

Quick Answer

C07B8 means: C07B8 indicates a communication error with the Body Control Module (BCM).

Fix: Check and replace faulty components Cost: $300 - $700 Time: 90-180 minutes

Can I drive with C07B8? Immediate attention is recommended to prevent electrical system failures.

Common Questions

What does C07B8 mean and how does it affect my car?

C07B8 indicates a communication error with your vehicle's Body Control Module (BCM). This can lead to various issues, such as malfunctioning lights, power windows, and central locking systems. If left unaddressed, it can cause serious electrical failures, impacting both vehicle performance and safety.

What are the most common causes of C07B8 and how much does it cost to fix?

Common causes of C07B8 include a faulty BCM, damaged wiring, or loose connections. Repair costs can vary widely, from $100 for wiring repairs to $700 for BCM replacement, depending on the extent of the issue and labor involved.

Can I drive my car with C07B8 or should I stop immediately?

While you may still be able to drive your vehicle, it is not advisable to ignore a C07B8 code. Driving with this error can lead to electrical failures that could compromise vehicle safety. It's best to have the issue diagnosed and repaired as soon as possible.

How can I diagnose C07B8 myself using GeekOBD APP?

Using the GeekOBD APP, connect it to your vehicle's OBD2 port to read the C07B8 code. Follow the app's instructions to check for other related codes and freeze frame data, which can help you pinpoint the issue. Perform inspections based on the data provided.

What vehicles are most commonly affected by C07B8?

C07B8 is commonly found in 2013-2020 Ford F-Series, 2015-2020 Chevrolet Silverado, and 2016-2020 Dodge Ram models. Check for any recalls or TSBs related to BCM issues in these vehicles.

How can I prevent C07B8 from happening again?

To prevent C07B8, regularly inspect your vehicle's wiring and connectors for signs of wear or corrosion. Additionally, avoid modifications that could interfere with the BCM, and keep your software updated with your local dealership.

What is C07B8?

The diagnostic trouble code (DTC) C07B8 indicates a communication error with the Body Control Module (BCM). This error typically arises when the BCM fails to communicate properly with other control modules in the vehicle. The BCM is crucial for managing various electrical systems, such as lighting, windows, and door locks. When a C07B8 code is triggered, it may lead to malfunctioning features like power windows not working, dashboard lights flickering, or the central locking system failing to respond. In terms of real-world implications, a malfunctioning BCM can cause a myriad of issues that affect both the comfort and safety of your vehicle. Ignoring this code can lead to further electrical issues and could potentially disable important systems, making it unsafe to drive. Commonly found in models from Ford (2013-2020), Chevrolet (2015-2020), and Dodge (2016-2020), the C07B8 code can be a sign of wiring issues, connector problems, or a failing BCM itself. Addressing the issue promptly is important to ensure the longevity and reliability of your vehicle.

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

Symptoms

Common symptoms when C07B8 is present:

  • The check engine light remains illuminated, indicating a fault in the vehicle's electrical system.
  • Power windows may fail to operate, leading to a frustrating experience for drivers and passengers.
  • Dashboard warning lights may flicker or operate erratically, which can confuse the driver regarding the vehicle's actual status.
  • Central locking system may not function correctly, leaving doors unsecured or unresponsive.
  • The vehicle may experience intermittent starting issues due to electrical malfunctions caused by BCM failure.

Possible Causes

Most common causes of C07B8 (ordered by frequency):

  1. The most common cause of C07B8 is a faulty Body Control Module, with a likelihood of 60% in vehicles showing this DTC. A BCM can fail due to age, moisture ingress, or electrical surges.
  2. Wiring issues account for about 25% of cases, where damaged, frayed, or corroded wiring can disrupt communication between the BCM and other modules.
  3. Connector problems, such as loose or corroded connections, are another common cause, contributing to 10% of C07B8 occurrences. Regular inspection and maintenance can help prevent this.
  4. Less common but serious causes include software glitches in the BCM, which may require a software update or reprogramming to resolve.
  5. A rare cause might be interference from aftermarket accessories or modifications, such as alarm systems or audio equipment, which can confuse the BCM.

C07B8 Repair Costs

Cost Breakdown by Repair Type

BCM Replacement

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

  • Total: $300 - $700
  • Success rate: 85%
Wiring Repair

Repairing or replacing damaged wiring or connectors associated with the BCM.

  • Total: $100 - $300
  • Success rate: 75%
Software Update

Updating the BCM software to the latest version to resolve glitches.

  • Total: $50 - $150
  • Success rate: 90%
Money-Saving Tips for C07B8
  • 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 C07B8 Diagnosis Process

Follow these systematic steps to accurately diagnose C07B8. 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 like the BCM and its wiring (20-30 minutes)

Step 3: Component testing - Use a multimeter or specific diagnostic tools to test suspected components like the BCM and its wiring (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 check for reoccurrence of the code (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and check for reoccurrence of the code (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: 2017 Ford F-150 BCM Replacement

Vehicle: 2017 Ford F-150, 45,000 miles

Problem: Customer reported that power windows and central locking system were malfunctioning.

Diagnosis: After using the GeekOBD APP, a C07B8 code was confirmed alongside other BCM-related codes. Visual inspection revealed corroded connectors.

Solution: The corroded connectors were replaced, and a new BCM was installed. The vehicle's electrical systems were thoroughly tested post-repair.

Cost: $600 (BCM: $500, labor: $100)

Result: Customer reported all systems functioning correctly with no reoccurrence of issues.

Case Study 2: 2019 Chevrolet Silverado Wiring Repair

Vehicle: 2019 Chevrolet Silverado, 30,000 miles

Problem: Dashboard lights flickering and intermittent starting issues.

Diagnosis: C07B8 code was retrieved using the GeekOBD APP. A detailed inspection showed damaged wiring near the BCM.

Solution: Wiring was repaired, and the BCM was reprogrammed to ensure proper functionality.

Cost: $200 (wiring repair: $150, labor: $50)

Result: All issues resolved, and the vehicle operated normally thereafter.

Diagnose C07B8

Use GeekOBD APP for professional diagnosis!

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  • Step-by-step repair guidance
  • Professional-grade analysis
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Code Information

Code: C07B8
System: Chassis (ABS, Steering, Suspension)
Severity: HIGH
Category: Chassis Codes