U0114 - Lost Communication with Body Control Module (BCM) - Common in 2013-2016 Chevrolet Silverado

Quick Answer

U0114 means: U0114 means there's a communication failure between the ECM and BCM.

Fix: Check and replace faulty components Cost: $150 - $400 Time: 90-180 minutes

Can I drive with U0114? Address this issue immediately to avoid further complications.

Common Questions

What does U0114 mean and how does it affect my car?

The U0114 code indicates that your car's main computer (ECM) is unable to communicate with the Body Control Module (BCM). This issue can disrupt critical functions such as lighting and window operation, leading to potential safety hazards. It's essential to address this code quickly to prevent further complications.

What are the most common causes of U0114 and how much does it cost to fix?

Common causes include damaged wiring (80% likelihood), faulty BCM (15%), and poor connections. Repairs can range from $150 to $800 depending on the issue. It's essential to have these diagnosed and repaired promptly to avoid escalating costs.

Can I drive my car with U0114 or should I stop immediately?

While you may be able to drive the vehicle, doing so is not recommended as it could lead to further issues, such as being unable to start the vehicle or losing critical functions unexpectedly. It's best to address the code immediately.

How can I diagnose U0114 myself using GeekOBD APP?

Using the GeekOBD APP, you can perform an OBD2 scan to retrieve the U0114 code and any related codes. Analyze freeze-frame data to understand when the fault occurred, and use the app to monitor live data parameters to check the status of the BCM.

What vehicles are most commonly affected by U0114?

Commonly affected vehicles include the 2013-2016 Chevrolet Silverado and the 2014-2018 GMC Sierra. These models are known for experiencing BCM communication issues, and owners should be aware of potential recalls or Technical Service Bulletins (TSBs) related to this problem.

How can I prevent U0114 from happening again?

Regular vehicle maintenance is key to preventing U0114. This includes checking wiring and connectors for corrosion, ensuring that all electrical components are functioning correctly, and addressing any dashboard warning lights promptly.

What is U0114?

The diagnostic trouble code U0114 indicates that there is a loss of communication between the Engine Control Module (ECM) and the Body Control Module (BCM). This communication is crucial for various functions, including lighting, power window operation, and security features. When the ECM cannot communicate with the BCM, it may lead to several operational issues. For example, you might notice that your vehicle's lights do not function correctly, the windows may not operate, or the vehicle might not start. Understanding this code is essential, especially for owners of affected models like the 2013-2016 Chevrolet Silverado or the 2014-2018 GMC Sierra. Ignoring this code could lead to more significant issues down the line, including total vehicle failure in extreme cases. It’s essential to address U0114 promptly, as it can affect other systems in your car, potentially leading to increased repair costs if not addressed in a timely manner.

System: U - Network (Communication, CAN Bus)

Symptoms

Common symptoms when U0114 is present:

  • Check engine light stays on constantly, indicating a persistent issue that needs attention.
  • Power windows may become inoperative, leading to inconvenience and potential safety issues.
  • Dashboard warning lights may illuminate unexpectedly, affecting visibility of other important alerts.
  • Vehicle may fail to start intermittently, leading to frustration and potential breakdowns.
  • Lighting systems may function erratically, causing safety concerns during night driving.

Possible Causes

Most common causes of U0114 (ordered by frequency):

  1. The most common cause is a faulty or damaged wiring harness, which has an 80% likelihood in many cases. Inspecting for frayed wires or bad connections is crucial.
  2. A malfunctioning Body Control Module (BCM) can also trigger this code, with around a 15% occurrence. If the BCM is not properly communicating, it may need to be replaced.
  3. Corrosion at connectors or poor ground connections can also lead to communication issues, which is why regular maintenance of electrical components is advisable.
  4. Less common but serious causes may include a failed Engine Control Module (ECM), which can significantly affect vehicle performance.
  5. In rare instances, software glitches in the vehicle's computer systems can cause false codes, making a reprogramming necessary.

U0114 Repair Costs

Cost Breakdown by Repair Type

Wiring Repair

Repair or replace damaged wiring and connectors to restore communication.

  • Total: $150 - $400
  • Success rate: 85%
BCM Replacement

Replace the Body Control Module if it is diagnosed as faulty.

  • Total: $300 - $800
  • Success rate: 90%
ECM Reprogramming

Reprogram the Engine Control Module if software issues are detected.

  • Total: $100 - $200
  • Success rate: 75%
Money-Saving Tips for U0114
  • 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 U0114 Diagnosis Process

Follow these systematic steps to accurately diagnose U0114. 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, focusing on the BCM and associated wiring (20-30 minutes)

Step 3: Component testing - Use a multimeter or specific diagnostic tools to test suspected components, focusing on the BCM and associated 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, ensuring that all systems are communicating correctly (10-15 minutes)

Step 4: System function test - Verify proper operation after repairs and clear codes, ensuring that all systems are communicating correctly (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 any returning symptoms (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and check for any returning symptoms (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: Chevrolet Silverado U0114 Diagnosis and Repair

Vehicle: 2015 Chevrolet Silverado 1500, 60,000 miles

Problem: Customer reported intermittent starting issues and dashboard warning lights.

Diagnosis: After retrieving the U0114 code with the GeekOBD APP, a visual inspection revealed corroded connectors in the wiring harness.

Solution: Replaced the corroded connectors and repaired the damaged wiring. Cleared the codes and performed a function test.

Cost: $250 (wiring repair: $150, labor: $100)

Result: The vehicle started without issues, and all systems operated normally. Customer satisfied with the repair.

Case Study 2: GMC Sierra BCM Replacement

Vehicle: 2016 GMC Sierra 2500HD, 75,000 miles

Problem: Vehicle would not start, and the check engine light was illuminated.

Diagnosis: Scanned for codes with GeekOBD APP and confirmed U0114. BCM showed signs of failure.

Solution: Replaced the Body Control Module and reprogrammed it to the vehicle’s specifications.

Cost: $600 (BCM: $400, labor: $200)

Result: Post-repair, the vehicle started reliably, and all electronic functions were restored.

Diagnose U0114

Use GeekOBD APP for professional diagnosis!

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  • Professional-grade analysis
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Code Information

Code: U0114
System: Network (Communication, CAN Bus)
Severity: HIGH
Category: Network Codes