AutoCodes – GMC – U184A 2014 GMC Sierra

U184A 2014 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 2014 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 267

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 2014 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 2014 GMC Sierra - Lost Communication with Body Control Module on Low Speed CAN Bus - AutoCodes.com — U184A 2014 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 2014 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 2014 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 2014 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 2014 GMC Sierra code?

Need more information on how to fix the U184A 2014 GMC Sierra 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 U184A 2014 GMC Sierra Code

1. What are the common symptoms of OBDII code U184A in a 2014 GMC Sierra?

- Common symptoms include non-functioning power windows, door locks, interior lights, and other body control module-related features.

2. What can cause the OBDII code U184A to trigger in a 2014 GMC Sierra?

- The code U184A is usually triggered when there is a communication loss between the body control module and the low-speed CAN bus network.

3. How can I diagnose the issue causing the U184A code in my 2014 GMC Sierra?

- Diagnosis typically involves checking the wiring connections, inspecting for damaged wires or connectors, and using a scan tool to monitor communication on the CAN bus network.

4. Is it safe to drive my 2014 GMC Sierra with the U184A code present?

- It is not recommended to drive the vehicle with the U184A code active, as it can lead to potential safety issues due to non-functioning body control module features.

5. Can a DIY enthusiast repair the U184A code issue in a 2014 GMC Sierra?

- While some basic troubleshooting like checking connections can be done, diagnosing and repairing the root cause of the U184A code often requires professional diagnostic tools and expertise.

6. How much does it typically cost to repair the U184A code in a 2014 GMC Sierra?

- The cost of repair can vary depending on the specific cause of the communication loss, but it can range from a few hundred to over a thousand dollars at a dealership or repair shop.

7. Are there any preventive measures to avoid the U184A code issue in a 2014 GMC Sierra?

- Regularly checking the electrical connections, avoiding water damage, and addressing any electrical issues promptly can help prevent the U184A code from occurring.

8. Can a weak battery or alternator cause the U184A code in a 2014 GMC Sierra?

- Yes, a weak battery or alternator can potentially cause communication issues between the body control module and the low-speed CAN bus, leading to the U184A code.

9. Will resetting the OBDII code U184A in a 2014 GMC Sierra make it go away permanently?

- Resetting the code may temporarily clear the warning light, but if the underlying issue causing the U184A code is not addressed, it is likely to reappear.

10. How long does it take to repair the U184A code issue in a 2014 GMC Sierra?

- The repair time can vary depending on the exact cause of the problem, but it typically takes a few hours to a full day for a professional technician to diagnose and fix the issue.