AutoCodes – Chevrolet – U007C Chevrolet

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

Quick Answer

The devices connected to the object high-speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Check for more codes, Faulty Control Module, Control Module harness is open or shorted. 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 Chevrolet indicates Control Module Communication High Speed Extension CAN Bus 2 Off.
Common causes
Common causes include Check for more codes, Faulty Control Module, Control Module harness is open or shorted.
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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 3,132
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jul 20, 2023
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Code U007C Chevrolet Description

The devices connected to the object high-speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the devices when the ignition switch is in any position other than OFF. The object high-speed GMLAN serial data bus uses terminating resistors that are in parallel with the object high speed GMLAN (+) and (-) circuits. The Diagnostic Trouble Code (DTC) sets when a supervised periodic message that includes the transmitter device availability has not been received.
OBDII Code U007C Chevrolet - Control Module Communication High Speed Extension CAN Bus 2 Off - AutoCodes.com
U007C Chevrolet Code - Control Module Communication High Speed Extension CAN Bus 2 Off

What are the Possible Causes of the DTC U007C Chevrolet?

  • Check for more codes
  • Faulty Control Module
  • Control Module harness is open or shorted
  • Control Module circuit poor electrical connection

How to Fix the DTC U007C Chevrolet?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U007C Chevrolet code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the U007C Chevrolet code?

Need more information on how to fix the U007C Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U007C Chevrolet code diagnosed by a professional: Find a repair shop in your area

Information for Specific Chevrolet Models

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 Chevrolet Code

1. What are the common symptoms of OBDII code U007C in a Chevrolet vehicle?

Symptoms may include communication issues with various control modules, loss of functionality in certain vehicle systems, and warning lights on the dashboard.

2. What can cause the OBDII code U007C to occur in a Chevrolet?

The code U007C typically indicates a problem with the high-speed communication network between control modules, such as a wiring issue, faulty control module, or disrupted CAN bus connection.

3. How can I diagnose the OBDII code U007C in my Chevrolet?

Diagnosis involves using a professional OBDII scanner to retrieve the code, inspecting the wiring harness for damage, checking control module connections, and performing a thorough system scan.

4. Can a DIY enthusiast repair the OBDII code U007C in a Chevrolet?

While some basic troubleshooting like checking connections and wiring can be done by DIYers, resolving the U007C code may require specialized equipment and expertise, often best left to professional technicians.

5. Is it safe to continue driving with the OBDII code U007C present in a Chevrolet?

It is not recommended to drive with the U007C code active, as it can affect the functionality of important vehicle systems and potentially lead to further damage if left unresolved.

6. How much does it typically cost to repair the OBDII code U007C in a Chevrolet?

The cost of repairing the U007C code can vary depending on the underlying cause, but it may involve expenses for diagnosis, parts replacement, and labor, potentially ranging from a few hundred to over a thousand dollars.

7. Can a bad battery or alternator cause the OBDII code U007C in a Chevrolet?

While a weak battery or faulty alternator can potentially cause communication issues in a vehicle, they are not common direct causes of the U007C code. It is advisable to inspect the CAN bus connections and control modules first.

8. Will resetting the OBDII code U007C in a Chevrolet make it go away permanently?

Simply clearing the code without addressing the root cause will not permanently fix the issue. It is crucial to diagnose and repair the underlying problem to prevent the code from reappearing.

9. Are there any recalls or service bulletins related to the OBDII code U007C in Chevrolet vehicles?

It's advisable to check with a Chevrolet dealership or service center for any relevant recalls or service bulletins related to the U007C code, as manufacturers sometimes provide guidance for common issues.

10. Can extreme weather conditions impact the occurrence of the OBDII code U007C in a Chevrolet?

While extreme weather conditions may not directly cause the U007C code, temperature fluctuations or moisture can potentially exacerbate existing communication issues between control modules, leading to the code being triggered.

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