U0134 - Lost Communication with Body Control Module (BCM) - Common in 2010-2015 Chevrolet Camaro & Other Models

Quick Answer

U0134 means: U0134 indicates a loss of communication with the Body Control Module, affecting various electronic functions in your vehicle.

Fix: Check and replace faulty components Cost: $100 - $300 Time: 90-180 minutes

Can I drive with U0134? It's advisable to diagnose and repair this issue as soon as possible to avoid further electrical problems.

Common Questions

What does U0134 mean and how does it affect my car?

The U0134 code signifies that your vehicle's Engine Control Module cannot communicate with the Body Control Module. This can lead to various electrical failures, including issues with power windows, security systems, and dashboard indicators. If ignored, it may cause further complications in controlling your vehicle’s electronic systems.

What are the most common causes of U0134 and how much does it cost to fix?

Common causes include damaged wiring, a faulty BCM, and network communication issues. Repair costs can range from $100 for wiring repairs to $800 for BCM replacement, depending on the issue and labor involved.

Can I drive my car with U0134 or should I stop immediately?

While you may still be able to drive your vehicle, it is not advisable to ignore the U0134 code. Weak or malfunctioning electronic systems can pose safety risks. It’s best to diagnose and address the issue as soon as possible.

How can I diagnose U0134 myself using GeekOBD APP?

To diagnose U0134 with the GeekOBD APP, connect it to your car’s OBD2 port, run a full scan, and check for any related codes. Analyze the freeze frame data to understand when the issue occurs, and check the BCM’s voltage readings for any anomalies.

What vehicles are most commonly affected by U0134?

The U0134 code is often seen in 2010-2015 Chevrolet Camaro, but it can also affect other GM models of the same era, including certain Chevrolet, Buick, and GMC vehicles. Always check for any recalls that may address related electrical issues.

How can I prevent U0134 from happening again?

Regularly inspect your vehicle’s wiring and connections for wear and tear, keep moisture away from electrical components, and ensure that software updates are performed as recommended by your manufacturer.

What is U0134?

The DTC U0134 code indicates a loss of communication with the Body Control Module (BCM), which is integral to managing various electronic functions in your vehicle. This code typically arises when the Engine Control Module (ECM) cannot receive or send data to the BCM, resulting in a breakdown in communication. The BCM is responsible for numerous systems including lighting, door locks, and security features. When this communication is interrupted, drivers may experience various symptoms such as persistent warning lights, malfunctioning electronic components, or even issues with starting the vehicle. Common causes for U0134 include damaged wiring, a faulty BCM, or issues with the network communication protocols. If left unchecked, this could lead to further electrical problems, making it crucial for car owners to address this code promptly to prevent more extensive and costly repairs. This issue is particularly prevalent in models like the 2010-2015 Chevrolet Camaro, where electronic components are heavily integrated. Understanding U0134 is vital for ensuring your vehicle operates smoothly and maintaining the safety and convenience that modern vehicles provide.

System: U - Network (Communication, CAN Bus)

Symptoms

Common symptoms when U0134 is present:

  • Check engine light stays on constantly, indicating a persistent issue with the vehicle's electronics.
  • Power windows and door locks may fail to operate correctly, leading to inconvenience and security concerns.
  • The vehicle may exhibit intermittent starting issues, where sometimes it starts fine and other times it fails to start.
  • Dashboard warning lights are activated, including those for the security system and ABS, indicating potential threats to vehicle safety.
  • Dimming or flickering interior lights, suggesting electrical irregularities that could affect overall performance.

Possible Causes

Most common causes of U0134 (ordered by frequency):

  1. Damaged wiring or poor connections (60% likelihood) – This is the most common cause, often due to wear and tear or environmental factors affecting the wiring harness.
  2. Faulty Body Control Module (20% likelihood) – The BCM itself may fail due to internal issues or corruption, requiring replacement.
  3. Network communication issues (10% likelihood) – Problems with the vehicle's communication protocols can disrupt the signals between modules.
  4. Less common but serious cause includes water intrusion in the BCM area, which can damage the module and cause short circuits.
  5. Rare but possible cause is a corrupted software update in the BCM, requiring reprogramming or flashing of the module.

U0134 Repair Costs

Cost Breakdown by Repair Type

Wiring Repair

Repairing damaged wiring or connectors associated with the BCM.

  • Total: $100 - $300
  • Success rate: 85%
BCM Replacement

Replacing a faulty Body Control Module.

  • Total: $400 - $800
  • Success rate: 90%
Money-Saving Tips for U0134
  • 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 U0134 Diagnosis Process

Follow these systematic steps to accurately diagnose U0134. 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 to test the BCM and associated wiring for continuity and proper voltage (20-30 minutes)

Step 3: Component testing - Use a multimeter to test the BCM and associated wiring for continuity and proper voltage (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 of all electronic components after repairs and clear codes (10-15 minutes)

Step 4: System function test - Verify proper operation of all electronic components 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 the vehicle under various conditions to confirm repair success and monitor for recurring codes (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and monitor for recurring codes (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: Repair Case: 2012 Chevrolet Camaro BCM Replacement

Vehicle: 2012 Chevrolet Camaro, 70,000 miles

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

Diagnosis: After conducting an OBD2 scan, U0134 was confirmed along with other codes indicating BCM failure. Visual inspection showed corrosion on the BCM connectors.

Solution: Replaced the BCM and repaired the damaged wiring. The vehicle was then reprogrammed to ensure compatibility.

Cost: $650 (including parts and labor)

Result: The vehicle started without issues, and all electronic functions were restored.

Case Study 2: Repair Case: 2014 GMC Sierra Wiring Repair

Vehicle: 2014 GMC Sierra, 90,000 miles

Problem: Customer experienced a malfunctioning power lock system and dashboard warning lights.

Diagnosis: Using the GeekOBD APP, U0134 was detected. A thorough wiring inspection revealed frayed wires near the BCM.

Solution: Repaired the wiring by replacing the damaged sections and securing all connections.

Cost: $200 (including parts and labor)

Result: All systems returned to normal operation without further issues.

Diagnose U0134

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: U0134
System: Network (Communication, CAN Bus)
Severity: HIGH
Category: Network Codes