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U007C 2014 Chevrolet Silverado Code - Control Module Communication High Speed Extension CAN Bus 2 Off

Quick Answer

The U007C diagnostic trouble code (DTC) for a 2014 Chevrolet Silverado refers to a problem with the Control Module Communication High Speed Extension CAN Bus 2. Common causes include Damaged wiring or connectors in the high-speed CAN bus network, Faulty control module responsible for communication on the CAN bus, Software glitches or corrupted data in the control modules. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
U007C 2014 Chevrolet Silverado indicates Control Module Communication High Speed Extension CAN Bus 2 Off.
Common causes
Common causes include Damaged wiring or connectors in the high-speed CAN bus network, Faulty control module responsible for communication on the CAN bus, Software glitches or corrupted data in the control modules.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 12, 2024
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Code U007C 2014 Chevrolet Silverado Description

The U007C diagnostic trouble code (DTC) for a 2014 Chevrolet Silverado refers to a problem with the Control Module Communication High Speed Extension CAN Bus 2. This code indicates that there is a communication issue between the control modules in the vehicle that operate on the high-speed CAN bus 2 network. The high-speed CAN bus is a communication network used by various modules in the vehicle to exchange information and commands rapidly. When there is a fault in this system, it can lead to a range of issues affecting the vehicle's performance and functionality.

OBDII Code U007C 2014 Chevrolet Silverado - Control Module Communication High Speed Extension CAN Bus 2 Off
U007C 2014 Chevrolet Silverado Code - Control Module Communication High Speed Extension CAN Bus 2 Off

Common Causes of U007C 2014 Chevrolet Silverado

  1. Damaged wiring or connectors in the high-speed CAN bus network
  2. Faulty control module responsible for communication on the CAN bus
  3. Software glitches or corrupted data in the control modules
  4. Water or moisture intrusion causing electrical issues
  5. Physical damage to the control module or related components

Symptoms of U007C 2014 Chevrolet Silverado

  1. Check engine light illuminated on the dashboard
  2. Poor engine performance, including rough idling or stalling
  3. Transmission shifting issues, such as harsh shifts or failure to shift
  4. Loss of traction control or stability control functionality
  5. Inability to communicate with certain vehicle modules through diagnostic tools

How to Fix U007C 2014 Chevrolet Silverado

  1. Perform a thorough visual inspection of the wiring and connectors in the high-speed CAN bus network to identify any damage or corrosion.
  2. Use a diagnostic scan tool to communicate with the control modules and retrieve specific fault codes related to the communication issue.
  3. Test the control modules involved in the communication network to determine if any are faulty and require replacement.
  4. Clear the DTC from the vehicle's memory after completing the repair and verify that the communication between modules is restored.
  5. Conduct a road test to ensure that the vehicle's performance and functionality have returned to normal.

Cost to Fix U007C 2014 Chevrolet Silverado

The typical repair costs for addressing the Control Module Communication High Speed Extension CAN Bus 2 Off code in a 2014 Chevrolet Silverado can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, the cost may range from $200 to $800, including parts and labor. It's important to note that diagnostic time and labor rates at auto repair shops can fluctuate based on factors such as location, vehicle make and model, and the complexity of the repair. Therefore, it's advisable to inquire about local rates to obtain a more accurate estimate for resolving this particular problem.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about U007C 2014 Chevrolet Silverado Code

1. What does the OBDII code U007C mean on a 2014 Chevrolet Silverado?

U007C indicates a communication issue on the High-Speed CAN Bus 2, where a control module is unable to communicate properly.

2. What are common symptoms of code U007C on a 2014 Chevy Silverado?

Symptoms may include warning lights on the dashboard (e.g., check engine light), erratic transmission behavior, loss of communication with certain modules, or vehicle performance issues.

3. What causes the U007C code to appear?

Common causes include damaged wiring, loose or corroded CAN Bus connections, a malfunctioning control module, or a blown fuse related to the CAN Bus system.

4. How do I diagnose the U007C code on my Silverado?

Start by inspecting the wiring and connectors for damage or corrosion, checking for blown fuses, and using a scan tool to identify any additional related codes.

5. Can a weak battery cause the U007C code?

Yes, a weak or failing battery can disrupt communication between control modules and trigger the U007C code.

6. How do I fix the U007C code on my 2014 Chevrolet Silverado?

Repairs may include fixing or replacing damaged wiring, cleaning or securing loose connections, replacing a blown fuse, or reprogramming or replacing a faulty control module.

7. Is it safe to drive with the U007C code active?

It depends on the severity of the issue. If the communication failure affects critical systems like the transmission or braking, it may not be safe to drive.

8. Which control modules are affected by the U007C code?

The specific modules affected will vary, but it typically involves those connected to the High-Speed CAN Bus 2, such as the Engine Control Module (ECM) or Transmission Control Module (TCM).

9. How much does it cost to fix the U007C code?

Repair costs vary depending on the issue. Simple fixes like repairing wiring or replacing a fuse could cost under $100, while replacing a control module may cost several hundred dollars or more.

10. Can a DIYer fix the U007C code on a 2014 Silverado?

If the issue is minor, such as a loose connection or blown fuse, a DIYer with basic tools and knowledge may be able to fix it. For complex issues like module replacement or reprogramming, professional assistance is recommended.

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