AutoCodes – Chevrolet – U184A 2015 Chevrolet Silverado

U184A 2015 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 2015 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 236

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code U184A 2015 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 2015 Chevrolet Silverado - Lost Communication with Body Control Module on Low Speed CAN Bus - AutoCodes.com — U184A 2015 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 2015 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 2015 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 2015 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 2015 Chevrolet Silverado code?

Need more information on how to fix the U184A 2015 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U184A 2015 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 2015 Chevrolet Silverado Code

1. What does OBDII code U184A mean on a 2015 Chevrolet Silverado?

The U184A code indicates that there has been a loss of communication with the Body Control Module (BCM) on the Low Speed CAN Bus, suggesting an issue with the network communication path between the BCM and other modules.

2. What are the common symptoms of code U184A in a 2015 Chevrolet Silverado?

Symptoms may include erratic behavior of interior lights, issues with the central locking system, problems with the vehicleâ€™s alarm system, and potential malfunctions in other electronically controlled systems like the audio or navigation system.

3. What can cause the U184A code to appear in a 2015 Chevrolet Silverado?

Causes might include faulty or damaged wiring, a defective Body Control Module, issues with connectors or grounds, or interference from other electronic devices.

4. How do I fix the U184A code in a 2015 Chevrolet Silverado?

To fix this issue, check and repair any damaged wiring, ensure all connectors are clean and secure, replace any faulty components like the BCM if necessary, and clear the code to see if it returns.

5. Is it safe to drive a 2015 Chevrolet Silverado with the U184A code?

While the vehicle might still be drivable, it's important to address the issue promptly as it can affect various electronic systems in the vehicle, potentially leading to more serious problems or safety concerns.

6. How can I prevent the U184A code from occurring in my 2015 Chevrolet Silverado?

Regular maintenance and inspections of the vehicleâ€™s electrical system and ensuring that all firmware updates for the BCM are applied can help in preventing issues related to code U184A.

7. What tools are needed to diagnose the U184A code on a 2015 Chevrolet Silverado?

A professional-grade OBDII scanner, a digital multimeter, and a wiring diagram for the vehicle are essential tools for diagnosing and addressing this error code effectively.

8. Could the U184A code affect the overall performance of my 2015 Chevrolet Silverado?

While the code primarily affects communication functions, unresolved communication issues can lead to performance drops, especially if related systems like the engine or transmission controls are impacted.

9. What should I check first when diagnosing the U184A code in a 2015 Chevrolet Silverado?

Initially, inspect the BCM connectors and wiring for any obvious signs of damage or corrosion. Also, check the grounding points as poor grounds can often cause communication issues.