AutoCodes – Generic – U0076

U0076 Code - Control Module Communication Powertrain Sensor CAN Bus 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: U0076 indicates Control Module Communication Powertrain Sensor CAN Bus 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.

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Code Popularity 2,289

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 20, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0076 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 U0076 - Control Module Communication Powertrain Sensor CAN Bus Off - AutoCodes.com — U0076 Code - Control Module Communication Powertrain Sensor CAN Bus Off

What does this mean?

What are the Possible Causes of the DTC U0076?

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 U0076?

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 U0076 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 U0076 code?

Need more information on how to fix the U0076 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U0076 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

U0076 Buick — Control Module Communication Powertrain Sensor CAN Bus Off
U0076 Cadillac — Control Module Communication Powertrain Sensor CAN Bus Off
U0076 Chevrolet — Control Module Communication Powertrain Sensor CAN Bus Off
U0076 GMC — Control Module Communication Powertrain Sensor CAN Bus Off

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 U0076 Code

1. What are common symptoms of OBDII code U0076?

- Common symptoms include the check engine light illuminating, issues with vehicle performance, and potential loss of communication with certain modules.

2. What does the U0076 code indicate?

- The U0076 code signifies that there is a communication issue between the control module and the Powertrain Sensor CAN Bus.

3. What are possible causes of the U0076 code?

- Possible causes include faulty wiring or connections, a malfunctioning control module, issues with the Powertrain Sensor CAN Bus, or a software glitch.

4. How can I diagnose the U0076 code?

- Diagnosis typically involves using a diagnostic scanner to retrieve the trouble codes and then conducting a thorough inspection of the wiring, connectors, and modules involved.

5. Can I continue driving with the U0076 code present?

- It is not recommended to continue driving with the U0076 code as it can lead to further damage or safety issues. It is best to address the underlying problem promptly.

6. How can I repair the U0076 code?

- Repair options may include checking and repairing any damaged wiring or connections, replacing the faulty control module, addressing issues with the CAN Bus, or updating software as needed.

7. Can I reset the U0076 code on my own?

- While you can clear the code with a diagnostic scanner, it is important to address the underlying issue causing the code to prevent it from reoccurring.

8. Is the U0076 code specific to a particular vehicle make or model?

- The U0076 code can be found in various vehicle makes and models that are equipped with OBDII systems and CAN Bus communication.

9. What should I do if the U0076 code keeps coming back after repairs?

- If the U0076 code persists after repairs, it may indicate that the underlying issue was not fully resolved. It is advisable to recheck the components involved and seek further diagnostic assistance if needed.

10. Are there any preventative measures to avoid the U0076 code?

- Regular maintenance, such as checking and cleaning wiring connections, can help prevent issues that may lead to the U0076 code. Additionally, addressing any related trouble codes promptly can help prevent further complications.