AutoCodes – Chevrolet – U184A 2018 Chevrolet Silverado

U184A 2018 Chevrolet Silverado Code - Lost Communication with Body Control Module 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 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: U184A 2018 Chevrolet Silverado indicates Lost Communication with Body Control Module on Low Speed CAN Bus.
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 214

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 U184A 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 U184A 2018 Chevrolet Silverado - Lost Communication with Body Control Module on Low Speed CAN Bus - AutoCodes.com — U184A 2018 Chevrolet Silverado Code - Lost Communication with Body Control Module on Low Speed CAN Bus

What does this mean?

What are the Possible Causes of the DTC U184A 2018 Chevrolet Silverado?

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 U184A 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 U184A 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 U184A 2018 Chevrolet Silverado code?

Need more information on how to fix the U184A 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals

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Get the U184A 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 U184A 2018 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code U184A in a 2018 Chevrolet Silverado?

The common symptoms include issues with power windows, door locks, interior lights, and other body control functions not working properly.

2. What can cause the U184A code in a 2018 Chevrolet Silverado?

The U184A code is typically triggered by a communication error between the Body Control Module (BCM) and the Low Speed Controller Area Network (CAN) bus.

3. How can I diagnose the U184A code on a 2018 Chevrolet Silverado?

Diagnosing the U184A code requires using a diagnostic scanner to communicate with the vehicle's BCM and checking for any stored fault codes related to the communication error.

4. What are some potential repair tips for fixing the U184A code in a 2018 Chevrolet Silverado?

Repairing the U184A code may involve checking the wiring harness connections for any loose or damaged wires, resetting the BCM, or replacing the BCM if necessary.

5. Can the U184A code in a 2018 Chevrolet Silverado be fixed without professional help?

While some basic troubleshooting steps can be taken by DIY enthusiasts, resolving the U184A code may require advanced diagnostic tools and expertise, so seeking professional help is recommended.

6. Is it safe to continue driving a 2018 Chevrolet Silverado with the U184A code present?

It is not recommended to drive the vehicle with the U184A code active, as it can lead to further electrical issues and affect the overall functionality of important body control systems.

7. Will resetting the U184A code make it go away permanently in a 2018 Chevrolet Silverado?

Resetting the code may temporarily clear the fault, but if the underlying communication issue between the BCM and the Low Speed CAN bus is not addressed, the code is likely to reappear.

8. How much does it typically cost to repair the U184A code in a 2018 Chevrolet Silverado?

The cost of repairing the U184A code can vary depending on the extent of the issue, the need for parts replacement, and labor costs at a repair shop. It's advisable to get a professional diagnosis for an accurate estimate.

9. Can extreme weather conditions contribute to triggering the U184A code in a 2018 Chevrolet Silverado?

Extreme weather conditions, such as excessive heat or moisture, can potentially affect the electrical connections and components, leading to communication errors and the activation of the U184A code.

10. Are there any recalls or service bulletins related to the U184A code in a 2018 Chevrolet Silverado?

It's recommended to check with a Chevrolet dealership or visit the National Highway Traffic Safety Administration (NHTSA) website to see if there are any recalls or service bulletins related to the U184A code in the 2018 Silverado.