AutoCodes – Chevrolet – U0078 2016 Chevrolet Silverado

U0078 2016 Chevrolet Silverado Code - Control Module Communication Low Speed CAN Bus Off

Quick Answer

The low-speed General Motor Local Area Network (GMLAN) serial data bus is used to communicate information between the devices. 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: U0078 2016 Chevrolet Silverado indicates Control Module Communication Low Speed 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 357

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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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 U0078 2016 Chevrolet Silverado Description

The low-speed General Motor Local Area Network (GMLAN) serial data bus is used to communicate information between the devices. The serial data is transmitted over a single wire to the appropriate devices. The low-speed GMLAN serial data circuits also connect directly to the Data Link Connector (DLC). The Diagnostic Trouble Code (DTC) sets when the device setting the DTC has attempted to establish communications on the serial data circuits more than 3 times in 5 s.

OBDII Code U0078 2016 Chevrolet Silverado - Control Module Communication Low Speed CAN Bus Off - AutoCodes.com — U0078 2016 Chevrolet Silverado Code - Control Module Communication Low Speed CAN Bus Off

What does this mean?

What are the Possible Causes of the DTC U0078 2016 Chevrolet Silverado?

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 U0078 2016 Chevrolet Silverado?

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 U0078 2016 Chevrolet Silverado 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 U0078 2016 Chevrolet Silverado code?

Need more information on how to fix the U0078 2016 Chevrolet Silverado 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 U0078 2016 Chevrolet Silverado Code

1. What does the OBDII code U0078 mean for a 2016 Chevrolet Silverado?

The U0078 code indicates a problem with the Control Module Communication Low Speed CAN Bus Off in your 2016 Chevrolet Silverado.

2. What are some common symptoms of the U0078 code in a 2016 Chevrolet Silverado?

Common symptoms of the U0078 code may include issues with the vehicle's communication system, such as loss of communication between control modules, warning lights on the dashboard, and potential drivability issues.

3. What are possible causes of the U0078 code in a 2016 Chevrolet Silverado?

Potential causes of the U0078 code include damaged wiring or connectors in the CAN bus system, faulty control modules, software glitches, or a weak battery.

4. How can I diagnose the U0078 code in my 2016 Chevrolet Silverado?

Diagnosing the U0078 code typically involves using an OBDII scanner to retrieve the code, checking for any other related codes, inspecting the wiring and connectors in the CAN bus system, and testing the control modules for proper communication.

5. Can I still drive my 2016 Chevrolet Silverado with the U0078 code present?

It is not recommended to drive your vehicle with the U0078 code present, as it can lead to potential safety risks and further damage to the vehicle's control modules.

6. How can the U0078 code in a 2016 Chevrolet Silverado be repaired?

Repairing the U0078 code may involve fixing any damaged wiring or connectors, replacing faulty control modules, updating software if necessary, and ensuring the battery is in good condition.

7. Is the U0078 code in a 2016 Chevrolet Silverado easy to fix at home?

Fixing the U0078 code may require advanced diagnostic tools and expertise, so it is recommended to consult a professional mechanic for proper diagnosis and repair.

8. Are there any specific maintenance tips to prevent the U0078 code in a 2016 Chevrolet Silverado?

Regularly checking the vehicle's electrical system, keeping the battery in good condition, and addressing any warning lights or communication issues promptly can help prevent the U0078 code from occurring.

9. Can a faulty sensor trigger the U0078 code in a 2016 Chevrolet Silverado?

While a faulty sensor may not directly trigger the U0078 code, it can contribute to communication issues between control modules and potentially lead to the code being set.

10. How long does it typically take to repair the U0078 code in a 2016 Chevrolet Silverado?

The time needed to repair the U0078 code can vary depending on the exact cause of the issue, but it may take a few hours to a day for a mechanic to properly diagnose and fix the problem.