AutoCodes – GMC – U2099 2014 GMC Sierra

U2099 2014 GMC Sierra Code - High Speed Communication Enable Circuit

Quick Answer

The Body Control Module (BCM) activates the ignition circuit, when the ignition key is in ACC, ON or START. Common causes include Faulty Body Control Module (BCM), Body Control Module harness is open or shorted, Body Control Module 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
U2099 2014 GMC Sierra indicates High Speed Communication Enable Circuit.
Common causes
Common causes include Faulty Body Control Module (BCM), Body Control Module harness is open or shorted, Body Control Module 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 352
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jul 24, 2023
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Code U2099 2014 GMC Sierra Description

The Body Control Module (BCM) activates the ignition circuit, when the ignition key is in ACC, ON or START. The ignition circuit wakes up the devices for serial data bus communication. The Diagnostic Trouble Code (DTC) will set when the BCM senses a short to ground on the ignition circuit.
OBDII Code U2099 2014 GMC Sierra - High Speed Communication Enable Circuit - AutoCodes.com
U2099 2014 GMC Sierra Code - High Speed Communication Enable Circuit

What are the Possible Causes of the DTC U2099 2014 GMC Sierra?

  • Faulty Body Control Module (BCM)
  • Body Control Module harness is open or shorted
  • Body Control Module circuit poor electrical connection

How to Fix the DTC U2099 2014 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U2099 2014 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 U2099 2014 GMC Sierra code?

Need more information on how to fix the U2099 2014 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U2099 2014 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

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 U2099 2014 GMC Sierra Code

1. What are common symptoms of OBDII code U2099 in a 2014 GMC Sierra?

The common symptoms of OBDII code U2099 in a 2014 GMC Sierra include issues with the high-speed communication enable circuit, such as intermittent or complete loss of communication with various control modules.

2. What does the OBDII code U2099 indicate in a 2014 GMC Sierra?

The OBDII code U2099 in a 2014 GMC Sierra specifically points to a fault in the high-speed communication enable circuit, which affects the vehicle's ability to communicate with different control modules effectively.

3. What are the possible causes of OBDII code U2099 in a 2014 GMC Sierra?

The possible causes of OBDII code U2099 in a 2014 GMC Sierra may include wiring or connection issues in the high-speed communication enable circuit, a faulty control module, or a defective communication network gateway module.

4. How can I diagnose the high-speed communication enable circuit issue related to OBDII code U2099 in a 2014 GMC Sierra?

To diagnose the high-speed communication enable circuit problem associated with OBDII code U2099 in a 2014 GMC Sierra, you can perform a thorough inspection of the wiring and connections, test the control modules for functionality, and check the communication network gateway module for any faults.

5. Are there any common repair tips for fixing OBDII code U2099 in a 2014 GMC Sierra?

Common repair tips for addressing OBDII code U2099 in a 2014 GMC Sierra include checking and repairing any damaged wiring or connections, replacing faulty control modules if necessary, and ensuring the communication network gateway module is functioning correctly.

6. Can OBDII code U2099 in a 2014 GMC Sierra cause other issues with the vehicle's performance?

Yes, OBDII code U2099 in a 2014 GMC Sierra can potentially cause other issues with the vehicle's performance due to the impact on communication between control modules. It is essential to address this code promptly to prevent further problems.

7. Is it safe to continue driving a 2014 GMC Sierra with OBDII code U2099 present?

It is not recommended to continue driving a 2014 GMC Sierra with OBDII code U2099 present, as the communication issues related to the high-speed communication enable circuit can affect various vehicle functions and potentially lead to further complications.

8. How long does it typically take to repair OBDII code U2099 in a 2014 GMC Sierra?

The repair time for OBDII code U2099 in a 2014 GMC Sierra can vary depending on the exact cause of the issue. Simple fixes like repairing wiring may take a short time, while more complex repairs involving control modules could require additional diagnostics and labor.

9. Can a DIY enthusiast fix OBDII code U2099 in a 2014 GMC Sierra, or is professional help recommended?

While some aspects of diagnosing and repairing OBDII code U2099 in a 2014 GMC Sierra may be possible for experienced DIY enthusiasts, it is generally recommended to seek professional help for this particular issue due to the complexity of the high-speed communication enable circuit.

10. How much does it cost to repair OBDII code U2099 in a 2014 GMC Sierra?

The cost of repairing OBDII code U2099 in a 2014 GMC Sierra can vary based on the specific cause of the issue, parts needed for replacement, labor costs, and whether professional diagnostic services are required. It is advisable to obtain quotes from reputable mechanics or technicians for an accurate estimate.

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