AutoCodes – Chevrolet – U0028 2014 Chevrolet Silverado

U0028 2014 Chevrolet Silverado Code - Media Oriented Systems Transport Bus

Quick Answer

The Media Oriented Systems Transport (MOST) bus consists of a physical ring in which multimedia devices share audio, video and infotainment system control data. Common causes include Faulty Audio Unit (Radio), Audio Unit harness is open or shorted, Audio Unit circuit poor electrical connection. 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: U0028 2014 Chevrolet Silverado indicates Media Oriented Systems Transport Bus.
Common causes: Common causes include Faulty Audio Unit (Radio), Audio Unit harness is open or shorted, Audio Unit circuit poor electrical connection.
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 335

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 19, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0028 2014 Chevrolet Silverado Description

The Media Oriented Systems Transport (MOST) bus consists of a physical ring in which multimedia devices share audio, video and infotainment system control data. Each device on the MOST bus transmits and receives data via the MOST Bus Serial Data (+/- transmit/receive) circuits. The MOST bus diagnostic master is the Radio. The MOST control circuit is connected to each device on the MOST bus. Each device provides a 12 V signal on the MOST control circuit. The Radio initiates communication on the MOST bus at Ignition ON by toggling the MOST control circuit low for 100 ms. Once each device recognizes the wakeup signal from the Radio on the MOST control circuit, they will respond to the Radio on the MOST bus to indicate no faults are present and normal communications will commence. The Diagnostic Trouble Code (DTC) sets when a fault occurs on transmit, receive, electronic control lines, or internal device failure.

OBDII Code U0028 2014 Chevrolet Silverado - Media Oriented Systems Transport Bus - AutoCodes.com — U0028 2014 Chevrolet Silverado Code - Media Oriented Systems Transport Bus

What does this mean?

What are the Possible Causes of the DTC U0028 2014 Chevrolet Silverado?

Faulty Audio Unit (Radio)
Audio Unit harness is open or shorted
Audio Unit circuit poor electrical connection

How to Fix the DTC U0028 2014 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 U0028 2014 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.

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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 U0028 2014 Chevrolet Silverado Code

1. What does the OBDII code U0028 mean on a 2014 Chevrolet Silverado?

U0028 indicates an issue with the Media Oriented Systems Transport (MOST) bus, a communication network for infotainment components.

2. What are common symptoms of the U0028 code in a 2014 Silverado?

Symptoms may include a non-functional infotainment system, no audio output, unresponsive touch screen, or error messages on the display.

3. What causes the U0028 code on a 2014 Chevrolet Silverado?

Common causes include faulty wiring in the MOST bus, damaged connectors, a malfunctioning infotainment module, or software glitches.

4. How can I diagnose the U0028 code on my Silverado?

Start by inspecting the MOST bus wiring and connectors for damage or loose connections. Use a scan tool to check for additional codes and test communication between modules.

5. Can a software update fix the U0028 code?

Yes, in some cases, a software update for the infotainment system or related modules can resolve the issue if itâ€™s caused by software bugs.

6. Is it safe to drive my Silverado with the U0028 code?

Yes, the U0028 code typically doesnâ€™t affect vehicle drivability, but it may impact the functionality of the infotainment system.

7. How do I reset the U0028 code after repairs?

Use an OBDII scan tool to clear the code. If the issue is resolved, the code should not return.

8. Could a blown fuse cause the U0028 code?

Yes, a blown fuse related to the infotainment or communication system can disrupt the MOST bus and trigger the code.

9. How much does it cost to fix the U0028 code on a 2014 Silverado?

Repair costs vary but can range from $50 for minor wiring repairs to $1,000 or more if a module replacement is needed.

10. Can I fix the U0028 code on my own?

If the issue is a loose connector or damaged wiring, you might be able to fix it yourself. However, diagnosing and repairing module issues may require professional tools and expertise.