AutoCodes – GMC – U184D 2016 GMC Sierra

U184D 2016 GMC Sierra Code - Lost Communication with Radio 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 Radio, Radio harness is open or shorted, Radio 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: U184D 2016 GMC Sierra indicates Lost Communication with Radio on Low Speed CAN Bus.
Common causes: Common causes include Faulty Radio, Radio harness is open or shorted, Radio 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 212

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 U184D 2016 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 U184D 2016 GMC Sierra - Lost Communication with Radio on Low Speed CAN Bus - AutoCodes.com — U184D 2016 GMC Sierra Code - Lost Communication with Radio on Low Speed CAN Bus

What does this mean?

What are the Possible Causes of the DTC U184D 2016 GMC Sierra?

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

How to Fix the DTC U184D 2016 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 U184D 2016 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 U184D 2016 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 U184D 2016 GMC Sierra Code

1. What are the common symptoms of OBDII code U184D on a 2016 GMC Sierra?

- Common symptoms include loss of communication with the radio, malfunctioning infotainment system, and possible issues with other low-speed CAN bus modules.

2. What could cause the U184D code in a 2016 GMC Sierra?

- The U184D code is typically triggered by a communication error between the radio module and the low-speed CAN bus network, which can be caused by wiring issues, a faulty radio module, or a problem with the CAN bus network itself.

3. How can I diagnose the U184D code on my 2016 GMC Sierra?

- Diagnosis involves checking the wiring connections between the radio module and the CAN bus network, testing the radio module for functionality, and using a diagnostic scanner to communicate with the affected modules on the CAN bus network.

4. What are some repair tips for fixing the U184D code on a 2016 GMC Sierra?

- Repair tips include inspecting and repairing any damaged wiring, replacing the faulty radio module if necessary, ensuring proper connections, and resetting the fault codes after repairs are completed.

5. Can the U184D code on a 2016 GMC Sierra cause any other issues with the vehicle?

- While the U184D code itself may not directly affect the vehicle's drivability, it can result in the loss of certain features like the radio and infotainment system. It is important to address the code to prevent any potential issues with other CAN bus modules.

6. Is it safe to continue driving my 2016 GMC Sierra with the U184D code present?

- It is generally safe to drive the vehicle with the U184D code, but it is recommended to address the issue promptly to avoid any inconvenience caused by the malfunctioning radio or potential communication problems with other modules on the CAN bus network.

7. Can I clear the U184D code on my 2016 GMC Sierra without fixing the underlying issue?

- While you can clear the fault code temporarily, it is not recommended as the issue will likely resurface until the root cause is addressed. Clearing the code without proper repair may lead to ongoing communication problems with the radio module.

8. Do I need specialized tools to repair the U184D code on my 2016 GMC Sierra?

- A diagnostic scanner capable of communicating with the vehicle's modules on the CAN bus network is essential for diagnosing and repairing the U184D code. Basic tools like a multimeter may also be useful for checking wiring continuity.

9. How long does it take to repair the U184D code on a 2016 GMC Sierra?

- The repair time for the U184D code can vary depending on the underlying cause. Simple fixes like reseating connectors may take a short time, while replacing a faulty radio module or repairing wiring issues could require more extensive work.

10. Can I fix the U184D code on my 2016 GMC Sierra myself, or should I seek professional help?

- If you have experience with automotive electrical systems and access to the necessary tools, you may be able to diagnose and repair the U184D code yourself. However, if you are unsure or uncomfortable working on these systems, it is advisable to seek help from a professional mechanic or technician.