AutoCodes – GMC – U2098 2016 GMC Sierra

U2098 2016 GMC Sierra Code - MOST Communication Enable Circuit Malfunction

Quick Answer

When the ignition is ON, the Radio initializes the Media Oriented Systems Transport (MOST) bus by sending a short 100 ms low voltage pulse on the electronic control line (or MOST control line) connected to all devices contained on the MOST ring. Common causes include Faulty Radio, Radio harness is open or shorted, Radio 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: U2098 2016 GMC Sierra indicates MOST Communication Enable Circuit Malfunction.
Common causes: Common causes include Faulty Radio, Radio harness is open or shorted, Radio 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 233

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 24, 2023

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code U2098 2016 GMC Sierra Description

When the ignition is ON, the Radio initializes the Media Oriented Systems Transport (MOST) bus by sending a short 100 ms low voltage pulse on the electronic control line (or MOST control line) connected to all devices contained on the MOST ring. When MOST receive, transmit or control line faults are detected, transmit/receive messages will not receive as expected from the wakeup request. The Radio and the Human Machine Interface Control Module will then perform diagnostics to isolate these MOST faults. If the MOST control line is shorted low to 0 V for an excess amount of time, the Radio and the Audio Amplifier, if equipped, will set a U2098 Diagnostic Trouble Code (DTC), and Human Machine Interface Control Module, if equipped, will set a U0029 02 DTC. At this point, the MOST bus will be unable to communicate until the shorted MOST control line is repaired. The DTC will be set when the Radio senses a short to ground on the MOST control circuit.

OBDII Code U2098 2016 GMC Sierra - MOST Communication Enable Circuit Malfunction - AutoCodes.com — U2098 2016 GMC Sierra Code - MOST Communication Enable Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC U2098 2016 GMC Sierra?

Faulty Radio
Radio harness is open or shorted
Radio circuit poor electrical connection

How to Fix the DTC U2098 2016 GMC Sierra?

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 does this mean?

Code Tech Notes

U2098 00 MOST Communication Enable Circuit Malfunction
U2098 02 MOST Communication Enable Circuit Short to Ground

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U2098 2016 GMC Sierra 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 U2098 2016 GMC Sierra code?

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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 U2098 2016 GMC Sierra Code

What does the OBDII code U2098 signify in a 2016 GMC Sierra?

U2098 indicates a malfunction in the MOST (Media Oriented Systems Transport) communication enable circuit, which is part of the vehicle's communication network.

What are the common symptoms associated with the U2098 code?

Common symptoms may include issues with audio or infotainment systems, loss of communication with certain modules, and warning lights on the dashboard.

What could cause the U2098 code to trigger in my GMC Sierra?

Possible causes include a faulty MOST communication module, damaged wiring or connectors in the circuit, or issues with the vehicleâ€™s electrical system.

How can I diagnose the U2098 code in my vehicle?

Begin by using an OBDII scanner to confirm the code, then inspect the MOST communication module, check for wiring damage, and ensure all connections are secure.

What are some common repair tips for fixing the U2098 code?

Repairs may involve replacing a faulty MOST module, repairing damaged wiring, or reseating connectors. Make sure to verify that the battery and ground connections are solid.

Can I drive my GMC Sierra with the U2098 code present?

While it may be possible to drive the vehicle, it is not advisable because it may affect the performance of the infotainment system and could lead to further electrical issues.

Is the U2098 code a serious issue that requires immediate attention?

Yes, it is recommended to address the U2098 code promptly to prevent further complications with vehicle communication systems and ensure all features function properly.

Will clearing the U2098 code resolve the issue permanently?

Clearing the code may temporarily remove the warning, but it will return if the underlying issue is not resolved. Itâ€™s important to diagnose and repair the root cause.

Are there any specific tools needed to diagnose U2098?

An OBDII scanner is essential for reading the code, and a multimeter may be useful for testing electrical connections and wiring integrity.