AutoCodes – Chevrolet – U18B9 2016 Chevrolet Silverado

U18B9 2016 Chevrolet Silverado Code - Primary High Speed CAN Bus Subnet Configuration List

Quick Answer

The devices on the high-speed General Motor Local Area Network (GMLAN) serial data bus and the chassis high-speed GMLAN serial data bus must be programmed with software that specifically identifies the correct type and quantity of devices on the bus based on RPO configuration. Common causes include Faulty Module that is not configured, Module harness is open or shorted, 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: U18B9 2016 Chevrolet Silverado indicates Primary High Speed CAN Bus Subnet Configuration List.
Common causes: Common causes include Faulty Module that is not configured, Module harness is open or shorted, 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 219

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 24, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U18B9 2016 Chevrolet Silverado Description

The devices on the high-speed General Motor Local Area Network (GMLAN) serial data bus and the chassis high-speed GMLAN serial data bus must be programmed with software that specifically identifies the correct type and quantity of devices on the bus based on RPO configuration. If a device was not properly configured after installation, the appropriate U Code may be set for that device. No external circuit diagnosis is involved. The Diagnostic Trouble Code (DTC) will set when the device is not configured properly, or the device recognizes a programming error.

OBDII Code U18B9 2016 Chevrolet Silverado - Primary High Speed CAN Bus Subnet Configuration List - AutoCodes.com — U18B9 2016 Chevrolet Silverado Code - Primary High Speed CAN Bus Subnet Configuration List

What does this mean?

What are the Possible Causes of the DTC U18B9 2016 Chevrolet Silverado?

Faulty Module that is not configured
Module harness is open or shorted
Module circuit poor electrical connection

How to Fix the DTC U18B9 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 U18B9 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 U18B9 2016 Chevrolet Silverado code?

Need more information on how to fix the U18B9 2016 Chevrolet Silverado code? Get Access to Factory Service Manuals

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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 U18B9 2016 Chevrolet Silverado Code

1. What is the meaning of OBDII code U18B9 on a 2016 Chevrolet Silverado?

This code indicates an issue with the Primary High Speed CAN Bus Subnet Configuration List on the vehicle.

2. What are some common symptoms of OBDII code U18B9 in a 2016 Chevrolet Silverado?

Symptoms may include communication errors between control modules, malfunctioning network systems, or warning lights on the dashboard.

3. What are possible causes of OBDII code U18B9 on a 2016 Chevrolet Silverado?

Causes may include damaged wiring, faulty control modules, poor connections, or issues with the CAN bus network.

4. How can I diagnose OBDII code U18B9 in my 2016 Chevrolet Silverado?

Diagnosing this code typically involves checking the wiring, connectors, and control modules associated with the Primary High Speed CAN Bus Subnet Configuration List.

5. Can I drive my 2016 Chevrolet Silverado with OBDII code U18B9?

It is not recommended to drive the vehicle with unresolved OBDII codes, as they can indicate underlying issues that may affect safety and performance.

6. How can I reset OBDII code U18B9 on my 2016 Chevrolet Silverado?

Resetting the code can be done with an OBDII scanner or by disconnecting the vehicle's battery for a few minutes.

7. Is it safe to ignore OBDII code U18B9 in my 2016 Chevrolet Silverado?

Ignoring the code may lead to further complications with the vehicle's network systems, so it is best to address the underlying issue promptly.

8. Are there common repair tips for fixing OBDII code U18B9 on a 2016 Chevrolet Silverado?

Repair tips may include checking for loose connections, repairing damaged wiring, replacing faulty control modules, and ensuring proper communication within the CAN bus network.

9. Can a DIY enthusiast fix OBDII code U18B9 on a 2016 Chevrolet Silverado?

While some basic checks and repairs can be done by a DIY enthusiast, diagnosing and fixing complex network issues may require professional assistance.

10. How much does it cost to repair OBDII code U18B9 in a 2016 Chevrolet Silverado?

The cost of repair can vary depending on the underlying cause of the code, parts needed, and labor rates at the repair facility. It is recommended to obtain quotes from different shops for an accurate estimate.