AutoCodes – Buick – U0076 Buick

U0076 Buick 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 Buick 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 339

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 Buick 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 Buick - Control Module Communication Powertrain Sensor CAN Bus Off - AutoCodes.com — U0076 Buick Code - Control Module Communication Powertrain Sensor CAN Bus Off

What does this mean?

What are the Possible Causes of the DTC U0076 Buick?

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 Buick?

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 Buick 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 Buick code?

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

Need Help with the Code?

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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 U0076 Buick Code

1. What are common symptoms of OBDII code U0076 in a Buick?

The common symptoms include check engine light illumination, issues with the transmission shifting smoothly, and potential loss of communication between various control modules.

2. What causes the OBDII code U0076 in a Buick?

The code U0076 is typically caused by a fault in the communication between the powertrain control module (PCM) and the sensor control module over the Controller Area Network (CAN) bus.

3. How can I diagnose the OBDII code U0076 in my Buick?

Diagnosing the U0076 code requires using a professional OBDII scanner to retrieve the specific fault codes stored in the PCM. Additionally, checking the wiring harnesses and connections related to the CAN bus system is crucial.

4. Can a faulty sensor trigger the U0076 code in a Buick?

Yes, a faulty sensor or control module connected to the CAN bus system can lead to the U0076 trouble code in a Buick, as it disrupts the communication between different modules.

5. What are some repair tips for fixing the U0076 code in a Buick?

Repair tips for resolving the U0076 code may include inspecting and repairing any damaged wiring or connectors in the CAN bus system, resetting the fault codes after repairs, and ensuring all control modules are communicating properly.

6. Is it safe to continue driving with the U0076 code present in a Buick?

While the vehicle may still be operable with the U0076 code, it is recommended to address the issue promptly to prevent potential long-term damage to the vehicle's control modules and ensure optimal performance.

7. Can a DIY enthusiast fix the U0076 code in a Buick?

Depending on your level of automotive knowledge and experience working with electrical systems, you may be able to address the U0076 code yourself by inspecting the wiring and connections related to the CAN bus system. However, professional help is often recommended for accurate diagnosis and repair.

8. How much does it typically cost to repair the U0076 code in a Buick?

The cost of repairing the U0076 code in a Buick can vary depending on the specific underlying issue causing the code, the labor rates of the repair shop, and the cost of any replacement parts needed.

9. Can a disconnected or dead battery cause the U0076 code to appear in a Buick?

Yes, a disconnected or dead battery can sometimes trigger communication errors between the control modules, leading to the U0076 trouble code in a Buick. It is advisable to ensure the battery is properly connected and charged before diagnosing further.

10. Are there any recalls related to the U0076 code in Buick vehicles?

Recalls specific to the U0076 code in Buick vehicles may vary, and it is recommended to check with the manufacturer or authorized dealerships for any relevant recall information related to this particular issue.