AutoCodes – Chevrolet – U184D Chevrolet

U184D Chevrolet 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 Chevrolet 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 717

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

What does this mean?

What are the Possible Causes of the DTC U184D Chevrolet?

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

How to Fix the DTC U184D Chevrolet?

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 Chevrolet 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 Chevrolet code?

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Need Help with the Code?

Get the U184D Chevrolet code diagnosed by a professional: Find a repair shop in your area

Information for Specific Chevrolet Models

U184D 2014 Chevrolet Silverado — Lost Communication with Radio on Low Speed CAN Bus
U184D 2015 Chevrolet Silverado — Lost Communication with Radio on Low Speed CAN Bus
U184D 2016 Chevrolet Silverado — Lost Communication with Radio on Low Speed CAN Bus
U184D 2017 Chevrolet Silverado — Lost Communication with Radio on Low Speed CAN Bus
U184D 2018 Chevrolet Silverado — Lost Communication with Radio on Low Speed CAN Bus

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 Chevrolet Code

1. What are the common symptoms of OBDII code U184D in a Chevrolet related to lost communication with the radio on the low-speed CAN bus?

- Common symptoms include the radio not functioning properly, display screen issues, loss of audio controls on the steering wheel, and intermittent communication errors.

2. What are the possible causes of OBDII code U184D in a Chevrolet indicating lost communication with the radio on the low-speed CAN bus?

- Potential causes may include a faulty radio unit, damaged wiring or connectors in the CAN bus network, a defective radio control module, or issues with the vehicle's main computer.

3. How can I diagnose the source of the problem when experiencing OBDII code U184D in a Chevrolet due to lost communication with the radio on the low-speed CAN bus?

- Using a diagnostic scanner to check for other related trouble codes, inspecting the wiring connections, and performing a CAN bus network test are recommended diagnostic steps.

4. Can I still drive my Chevrolet if OBDII code U184D is present, indicating lost communication with the radio on the low-speed CAN bus?

- While it may be safe to drive the vehicle with this code, it is essential to address the underlying issue promptly to prevent further electrical system problems.

5. Are there any simple repair tips to consider when troubleshooting OBDII code U184D in a Chevrolet related to lost communication with the radio on the low-speed CAN bus?

- Checking and securing all wiring connections, ensuring the radio unit is properly powered, and resetting the vehicle's computer system can sometimes resolve communication issues.

6. Is it necessary to visit a dealership or automotive technician for repairs when encountering OBDII code U184D in a Chevrolet indicating lost communication with the radio on the low-speed CAN bus?

- While some DIY enthusiasts may be able to address the problem, seeking professional help from a dealership or experienced technician is recommended for complex electrical issues.

7. What role does the low-speed CAN bus play in the communication between the radio and other components in a Chevrolet triggering OBDII code U184D?

- The low-speed CAN bus serves as a network that allows various modules in the vehicle, including the radio, to communicate and share information with each other effectively.

8. Can a software update or reprogramming of the vehicle's modules help resolve OBDII code U184D in a Chevrolet related to lost communication with the radio on the low-speed CAN bus?

- In some cases, performing a software update or reprogramming the modules involved in the communication system can address communication errors and clear the trouble code.

9. Are there any recalls or technical service bulletins (TSBs) issued by Chevrolet regarding OBDII code U184D and the lost communication with the radio on the low-speed CAN bus issue?

- It is advisable to check with Chevrolet dealerships or online databases for any relevant recalls or TSBs that may provide guidance or solutions for this specific problem.

10. How can regular maintenance and inspection routines help prevent OBDII code U184D from occurring in a Chevrolet due to lost communication with the radio on the low-speed CAN bus?

- Conducting routine checks on the vehicle's electrical system, keeping the connections clean and secure, and addressing any communication issues promptly can help avoid triggering this trouble code.