B0974 - Understanding DTC B0974: Common Issues in 2015-2020 Ford and Chevrolet Models

Quick Answer

B0974 means: B0974 indicates a communication issue with the Body Control Module, affecting various electrical systems.

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

Can I drive with B0974? While it may not pose an immediate danger, addressing this code promptly is recommended to prevent further complications.

Common Questions

What does B0974 mean and how does it affect my car?

The B0974 code indicates an issue with your vehicle's Body Control Module, which manages many electrical systems. When this code appears, you may experience problems with features like your power windows, door locks, or dashboard lights. If not addressed, it could lead to further complications that may affect your vehicle's overall performance.

What are the most common causes of B0974 and how much does it cost to fix?

Common causes include a faulty Body Control Module or damaged wiring. Fixing a faulty BCM can cost between $300 to $600, while wiring repairs may range from $100 to $300. It's essential to diagnose the issue accurately to determine the proper solution.

Can I drive my car with B0974 or should I stop immediately?

While you may be able to drive your vehicle, it's advisable to address the B0974 code as soon as possible. Ignoring it could lead to further electrical issues or even safety concerns, particularly if crucial systems like door locks fail.

How can I diagnose B0974 myself using GeekOBD APP?

Using the GeekOBD APP, connect to your vehicle's OBD-II port and perform a full scan to retrieve codes. The app allows you to view freeze frame data, which helps in understanding the context of the fault. Look for other related codes that may provide additional insight into the problem.

What vehicles are most commonly affected by B0974?

This code frequently appears in 2015-2020 Ford F-150 and Chevrolet Silverado models. It's important to check for any recalls or TSBs related to the BCM for your specific vehicle.

How can I prevent B0974 from happening again?

Regular vehicle maintenance, including electrical system checks, can help prevent issues related to the BCM. Keeping software updated and addressing any signs of electrical problems early can also reduce the likelihood of encountering this code in the future.

What is B0974?

The Diagnostic Trouble Code (DTC) B0974 indicates a potential issue with the vehicle's Body Control Module (BCM) or a related communication fault within the network. This code often appears in vehicles from manufacturers like Ford and Chevrolet, particularly from 2015 to 2020. The BCM is responsible for managing various electrical systems in the vehicle, including lighting, door locks, and other convenience features. When the BCM detects a problem, it communicates this via the OBD-II system, triggering the B0974 code. Real-world implications of this code can range from minor inconveniences, such as inoperative interior lights or malfunctioning door locks, to more significant issues that may affect the vehicle's overall reliability and safety. Car owners may notice that certain electronic features are not functioning correctly, and in some cases, the check engine light may remain illuminated. If left unresolved, these issues could lead to further complications down the road, impacting vehicle performance and potentially leading to higher repair costs.

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

Symptoms

Common symptoms when B0974 is present:

  • Check engine light remains illuminated, indicating an underlying issue with the vehicle's electrical systems.
  • Interior lights may fail to operate, leading to inconvenience when entering or exiting the vehicle at night.
  • Power windows and door locks may become unresponsive, affecting the vehicle's accessibility and security.
  • Dashboard warning lights for individual systems may appear sporadically, hinting at a broader underlying issue.
  • Inconsistent operation of the vehicle's alarm system, which may fail to activate or deactivate properly.

Possible Causes

Most common causes of B0974 (ordered by frequency):

  1. The most common cause of the B0974 code is a faulty Body Control Module (BCM), responsible for managing various electronic functions (about 60% likelihood).
  2. Another potential cause is damaged wiring or connectors, which can interrupt communication between the BCM and other systems in the vehicle.
  3. Software glitches in the BCM may also trigger this code; keeping the vehicle's software updated can help prevent such issues.
  4. Less common, but serious, could be a failure in the vehicle's Integrated Control Module, which may require extensive diagnostics to identify.
  5. A rare cause might be an issue with the vehicle's fuse box, where blown fuses can disrupt normal operations and communication.

B0974 Repair Costs

Cost Breakdown by Repair Type

BCM Replacement

Replacing the faulty Body Control Module with a new OEM part.

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

Repairing any damaged wiring or connectors that are causing communication faults.

  • Total: $100 - $300
  • Success rate: 90%
Money-Saving Tips for B0974
  • 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 B0974 Diagnosis Process

Follow these systematic steps to accurately diagnose B0974. 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 (20-30 minutes)

Step 3: Component testing - Use a multimeter or specific diagnostic tools to test suspected components (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 (10-15 minutes)

Step 4: System function test - Verify proper operation after repairs and clear 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 vehicle under various conditions to confirm repair success (15-20 minutes)

Step 5: Road test verification - Drive vehicle under various conditions to confirm repair success (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 on 2017 Ford F-150

Vehicle: 2017 Ford F-150, 50,000 miles

Problem: Customer reported intermittent door lock failure and dashboard warning lights.

Diagnosis: After scanning with the GeekOBD APP, B0974 was confirmed alongside other electrical codes. A visual inspection revealed frayed wires near the BCM.

Solution: Replaced the Body Control Module and repaired damaged wiring.

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

Result: All electrical functions restored, with follow-up confirming no recurring issues.

Case Study 2: Wiring Repair on 2019 Chevrolet Silverado

Vehicle: 2019 Chevrolet Silverado, 30,000 miles

Problem: Customer experienced malfunctioning power windows and check engine light.

Diagnosis: Diagnostic scan revealed B0974 and confirmed damaged connectors leading to the BCM.

Solution: Replaced the damaged connectors and ensured proper wiring integrity.

Cost: $150 (parts $50, labor $100)

Result: Resolved issues with windows, and the check engine light was cleared without recurrence.

Diagnose B0974

Use GeekOBD APP for professional diagnosis!

  • Real-time data monitoring
  • Advanced diagnostic features
  • Step-by-step repair guidance
  • Professional-grade analysis
Download GeekOBD APP Get MOBD Adapter

Code Information

Code: B0974
System: Body (Airbags, Lighting, Security, Climate Control)
Severity: MEDIUM
Category: Body Codes