AutoCodes – GMC – U184A 2015 GMC Sierra

U184A 2015 GMC Sierra 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 GMC Sierra 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 241

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

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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 U184A 2015 GMC Sierra Code

1. What are the common symptoms of OBDII code U184A in a 2015 GMC Sierra?

- Common symptoms include issues with power door locks, interior lights, and other body control module functions not working properly.

2. What are the possible causes of the U184A code on a 2015 GMC Sierra?

- The code may be triggered by a faulty body control module, damaged wiring or connectors in the low-speed CAN bus system, or a communication error between modules.

3. How can I diagnose the U184A code on my 2015 GMC Sierra?

- A professional diagnostic scan tool can be used to communicate with the body control module and identify the specific cause of the communication failure.

4. Can I still drive my 2015 GMC Sierra with the U184A code present?

- It is not recommended to drive the vehicle with the U184A code active, as it may lead to further electrical issues or malfunctions.

5. How can I repair the U184A code on my 2015 GMC Sierra?

- Repair options include checking and repairing any damaged wiring or connectors, replacing the body control module if necessary, and ensuring proper communication between modules.

6. Is it safe to attempt DIY repairs for the U184A code on a 2015 GMC Sierra?

- While some basic checks like inspecting wiring and connectors can be done by DIY enthusiasts, more complex repairs involving module replacement should be done by a professional.

7. How much does it typically cost to fix the U184A code on a 2015 GMC Sierra?

- The cost of repairs can vary depending on the specific issue, but it may range from a couple of hundred dollars for minor fixes to over a thousand dollars for module replacement.

8. Can a low battery voltage cause the U184A code to appear on a 2015 GMC Sierra?

- Yes, low battery voltage can sometimes trigger communication errors between modules, leading to the U184A code being set.

9. How long does it usually take to diagnose and repair the U184A code on a 2015 GMC Sierra?

- The diagnosis and repair process can take anywhere from a few hours to a full day, depending on the complexity of the issue and the availability of parts.

10. Will resetting the OBDII code clear the U184A code on a 2015 GMC Sierra?

- Resetting the code may temporarily clear it, but if the underlying issue causing the communication failure is not addressed, the code is likely to reappear.