AutoCodes – Chevrolet – U1836 2018 Chevrolet Silverado

U1836 2018 Chevrolet Silverado Code - Lost Communication with Amplifier on Low Speed CAN Bus

Quick Answer

The serial data circuit is the means by which the devices in the vehicle communicate with each other. Common causes include Faulty Amplifier, Amplifier harness is open or shorted, Amplifier 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: U1836 2018 Chevrolet Silverado indicates Lost Communication with Amplifier on Low Speed CAN Bus.
Common causes: Common causes include Faulty Amplifier, Amplifier harness is open or shorted, Amplifier 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 200

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
Cost to Diagnose
FAQs
Comments
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Code U1836 2018 Chevrolet Silverado Description

The serial data circuit is the means by which the devices in the vehicle communicate with each other. Once the scan tool is connected to the serial data circuit through the Data Link Connector (DLC), the scan tool can be used to monitor each device for diagnostic purposes and to check for Diagnostic Trouble Codes (DTC). When the vehicle is ON, each device communicating on the serial data circuit sends a state of health message to ensure that the device is operating properly. When a device stops communicating on the serial data circuit, for example, if the device loses power or ground, the state of health message it normally sends on the serial data circuit disappears. Other devices on the serial data circuit, which expect to receive that state of health message, detect its absence; those devices in turn set a DTC associated with the loss of state of health of the non-communicating device. A loss of serial data communications DTC does not represent a failure of the devices that contain the stored DTC.

OBDII Code U1836 2018 Chevrolet Silverado - Lost Communication with Amplifier on Low Speed CAN Bus - AutoCodes.com — U1836 2018 Chevrolet Silverado Code - Lost Communication with Amplifier on Low Speed CAN Bus

What does this mean?

What are the Possible Causes of the DTC U1836 2018 Chevrolet Silverado?

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

How to Fix the DTC U1836 2018 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 U1836 2018 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 U1836 2018 Chevrolet Silverado code?

Need more information on how to fix the U1836 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U1836 2018 Chevrolet Silverado 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 U1836 2018 Chevrolet Silverado Code

1. What are common symptoms of the OBDII code U1836 in a 2018 Chevrolet Silverado?

The common symptoms include malfunctioning audio system, loss of sound from the speakers, and issues with the vehicle's entertainment features.

2. What does the U1836 code "Lost Communication with Amplifier on Low Speed CAN Bus" mean in a 2018 Chevrolet Silverado?

The code indicates a communication problem between the vehicle's onboard computer and the amplifier on the low-speed CAN bus network.

3. What are possible causes of the U1836 code in a 2018 Chevrolet Silverado?

Possible causes include damaged wiring or connectors, a faulty amplifier, a malfunctioning CAN bus network, or issues with the vehicle's computer system.

4. How can I diagnose the U1836 code in my 2018 Chevrolet Silverado?

Diagnosing the code typically involves checking the wiring and connectors for damage, testing the amplifier for functionality, and inspecting the CAN bus network for faults using diagnostic tools.

5. Can the U1836 code be repaired at home, or do I need professional help?

While basic checks like inspecting wiring and connectors can be done at home, troubleshooting and repairing the communication issue with the amplifier may require professional help, especially when dealing with the vehicle's computer system.

6. Are there any quick tips for fixing the U1836 code in a 2018 Chevrolet Silverado?

Quick tips include ensuring all connections are secure, checking for any visible damage to wiring, and resetting the vehicle's computer system by disconnecting the battery for a few minutes.

7. Will driving with the U1836 code present cause any harm to my 2018 Chevrolet Silverado?

Driving with the code may not necessarily harm the vehicle, but it can result in continued issues with the audio system and other related features, impacting the overall driving experience.

8. How much can I expect to pay to repair the U1836 code in a 2018 Chevrolet Silverado?

The repair costs for the U1836 code can vary depending on the exact cause of the communication problem. It's recommended to get a diagnostic from a professional to determine the specific repairs needed.

9. Can the U1836 code in a 2018 Chevrolet Silverado cause other problems in the vehicle?

While the code itself pertains to the communication with the amplifier, unresolved communication issues within the vehicle's network can potentially cause other electrical problems or malfunctions.

10. Is the U1836 code a common issue in 2018 Chevrolet Silverado vehicles?

The U1836 code specifically related to "Lost Communication with Amplifier on Low Speed CAN Bus" may not be extremely common, but communication issues in modern vehicles can occur due to various factors and components.