AutoCodes – Chevrolet – U0028 2015 Chevrolet Silverado

U0028 2015 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 2015 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 331

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 2015 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 2015 Chevrolet Silverado - Media Oriented Systems Transport Bus - AutoCodes.com — U0028 2015 Chevrolet Silverado Code - Media Oriented Systems Transport Bus

What does this mean?

What are the Possible Causes of the DTC U0028 2015 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 2015 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 2015 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 2015 Chevrolet Silverado Code

1. What does OBDII code U0028 mean on a 2015 Chevrolet Silverado?

Code U0028 indicates a communication issue with the Media Oriented Systems Transport (MOST) bus, which is responsible for transmitting data between multimedia components like the infotainment system.

2. What are common symptoms of code U0028 in a 2015 Chevrolet Silverado?

Common symptoms include a malfunctioning infotainment system, no audio output, non-responsive radio or touchscreen, and intermittent connectivity with multimedia features.

3. What causes the U0028 code to appear in a 2015 Chevrolet Silverado?

The code can be triggered by faulty wiring, a damaged MOST bus connector, a failed multimedia module, software glitches, or insufficient power supply to the infotainment system.

4. Can a blown fuse cause the U0028 code in my Silverado?

Yes, a blown fuse associated with the infotainment system or MOST bus components can disrupt communication and trigger the U0028 code.

5. How do I diagnose the U0028 code on a 2015 Chevrolet Silverado?

Start by checking for loose or damaged MOST bus wiring, inspecting the fuses, and ensuring all multimedia modules are receiving power. Use a scan tool to identify specific module communication failures.

6. Can a software update fix the U0028 code in a 2015 Chevrolet Silverado?

Yes, if the issue is caused by a software glitch in the infotainment or multimedia system, updating the software may resolve the problem.

7. Is it safe to drive with the U0028 code active?

Yes, the U0028 code doesn't affect the vehicle's drivability, but multimedia features like audio and navigation might not function properly.

8. How much does it cost to repair the U0028 code on a 2015 Chevrolet Silverado?

Repair costs vary depending on the issue. Fixing wiring or fuses may cost under $100, while replacing a multimedia module could cost $200â€“$600 or more.

9. Can a dead battery cause the U0028 code in my Silverado?

Yes, a weak or dead battery can disrupt the MOST bus communication and trigger the U0028 code. Ensure the battery is fully charged and in good condition.

10. Do I need a professional mechanic to fix the U0028 code?

While some issues like checking fuses or loose connections can be handled by DIYers, diagnosing and repairing module failures or complex wiring issues may require a professional.