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U007B 2015 Chevrolet Silverado Code - Control Module Communication High Speed Extension CAN Bus Off

Quick Answer

The U007B diagnostic trouble code (DTC) for a 2015 Chevrolet Silverado indicates that there is a communication issue with the high-speed extension Controller Area Network (CAN) bus. Common causes include Faulty high-speed extension CAN bus wiring or connectors, Defective control module causing communication disruption, Water intrusion or corrosion in the CAN bus system. 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
U007B 2015 Chevrolet Silverado indicates Control Module Communication High Speed Extension CAN Bus Off.
Common causes
Common causes include Faulty high-speed extension CAN bus wiring or connectors, Defective control module causing communication disruption, Water intrusion or corrosion in the CAN bus system.
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 14, 2024
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Code U007B 2015 Chevrolet Silverado Description

The U007B diagnostic trouble code (DTC) for a 2015 Chevrolet Silverado indicates that there is a communication issue with the high-speed extension Controller Area Network (CAN) bus. The CAN bus is a network that allows various control modules in the vehicle to communicate with each other. When this code is triggered, it means that there is a disruption in the communication between these modules, which can lead to a range of issues affecting the vehicle's performance.

OBDII Code U007B 2015 Chevrolet Silverado - Control Module Communication High Speed Extension CAN Bus Off
U007B 2015 Chevrolet Silverado Code - Control Module Communication High Speed Extension CAN Bus Off

Common Causes of U007B 2015 Chevrolet Silverado

  1. Faulty high-speed extension CAN bus wiring or connectors
  2. Defective control module causing communication disruption
  3. Water intrusion or corrosion in the CAN bus system
  4. Software issues or programming errors in the control modules
  5. Electrical interference from aftermarket accessories or modifications

Symptoms of U007B 2015 Chevrolet Silverado

  1. Check engine light illuminated on the dashboard
  2. Loss of communication with various control modules
  3. Erratic or rough engine performance
  4. Transmission shifting issues
  5. ABS or traction control warning lights activated

How to Fix U007B 2015 Chevrolet Silverado

  1. Begin by conducting a thorough inspection of the high-speed extension CAN bus wiring and connectors for any signs of damage, corrosion, or loose connections.
  2. Use a diagnostic scan tool to identify the specific control module(s) that are not communicating properly and address any faults or errors within them.
  3. Check for water intrusion or corrosion in the CAN bus system and address any issues found, such as sealing leaks or replacing damaged components.
  4. Update the software in the control modules to the latest version provided by the manufacturer to address any programming errors or glitches.
  5. If electrical interference is suspected, remove any aftermarket accessories or modifications that may be causing disruptions in the communication system.

Cost to Fix U007B 2015 Chevrolet Silverado

The typical repair costs for addressing a U007B code in a 2015 Chevrolet Silverado can vary depending on the specific cause of the issue. In general, the parts required for this repair, such as wiring harnesses, connectors, or control modules, can range from $100 to $500. Labor costs at auto repair shops typically range from $80 to $150 per hour, with the total repair time varying based on the complexity of the issue. Overall, the total cost for resolving this code can range from $200 to $1000 or more, depending on the extent of the repairs needed. It is advisable to consult with a qualified mechanic or dealership for a more accurate estimate based on the specific diagnosis and repair requirements for your vehicle.

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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 U007B 2015 Chevrolet Silverado Code

1. What are common symptoms of OBDII code U007B in a 2015 Chevrolet Silverado?

- Common symptoms include issues with the vehicle's transmission, engine performance, and overall drivability. The check engine light may also illuminate.

2. What does the OBDII code U007B indicate in a 2015 Chevrolet Silverado?

- The code U007B indicates a problem with the Control Module Communication High Speed Extension CAN Bus Off in the vehicle's network.

3. What are possible causes of OBDII code U007B in a 2015 Chevrolet Silverado?

- Possible causes include faulty wiring or connections in the high-speed CAN bus network, a defective control module, or a communication error between modules.

4. How can I diagnose the OBDII code U007B in my 2015 Chevrolet Silverado?

- Diagnosing the code U007B typically involves using a professional OBDII scanner to retrieve the specific fault codes and then conducting a thorough inspection of the high-speed CAN bus system.

5. Can I still drive my 2015 Chevrolet Silverado with the U007B trouble code?

- It is not recommended to drive the vehicle with the U007B trouble code present, as it can lead to potential safety hazards and further damage to the vehicle's systems.

6. How can I repair OBDII code U007B in a 2015 Chevrolet Silverado?

- Repairing the U007B code may involve checking and repairing any damaged wiring or connections in the high-speed CAN bus system, replacing faulty control modules, and ensuring proper communication between modules.

7. Is it safe to clear the U007B trouble code in my 2015 Chevrolet Silverado?

- Clearing the trouble code temporarily may turn off the check engine light, but it is essential to diagnose and address the underlying issue causing the code to prevent further problems.

8. Can a DIY enthusiast fix the U007B code in a 2015 Chevrolet Silverado?

- While some basic troubleshooting like checking connections can be done by a DIY enthusiast, diagnosing and repairing the complex high-speed CAN bus system issues may require professional help.

9. How much does it cost to repair OBDII code U007B in a 2015 Chevrolet Silverado?

- The cost of repairing the U007B code can vary depending on the underlying issue, parts needed for replacement, and labor costs. It is advisable to get estimates from reputable automotive technicians.

10. How often does the U007B code occur in a 2015 Chevrolet Silverado?

- The U007B code may occur infrequently in a 2015 Chevrolet Silverado, but it is essential to address it promptly to prevent any potential damage to the vehicle's systems.

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