AutoCodes – Chevrolet – U184A Chevrolet

U184A Chevrolet 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 Chevrolet 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 1,032

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

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 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 U184A 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.

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Information for Specific Chevrolet Models

U184A 2014 Chevrolet Silverado — Lost Communication with Body Control Module on Low Speed CAN Bus
U184A 2015 Chevrolet Silverado — Lost Communication with Body Control Module on Low Speed CAN Bus
U184A 2016 Chevrolet Silverado — Lost Communication with Body Control Module on Low Speed CAN Bus
U184A 2017 Chevrolet Silverado — Lost Communication with Body Control Module on Low Speed CAN Bus
U184A 2018 Chevrolet Silverado — Lost Communication with Body Control Module 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 U184A Chevrolet Code

1. What are common symptoms of the OBDII code U184A in a Chevrolet related to lost communication with the Body Control Module on the Low Speed CAN Bus?

- Common symptoms include non-functioning power windows, power door locks, interior lights, and other electronic components controlled by the Body Control Module.

2. What are possible causes of the U184A code indicating lost communication with the Body Control Module on the Low Speed CAN Bus in a Chevrolet?

- Potential causes may include a faulty Body Control Module, damaged wiring harnesses, loose connections, or issues with the Low Speed CAN Bus network.

3. How can I diagnose the U184A code in a Chevrolet related to lost communication with the Body Control Module on the Low Speed CAN Bus?

- Diagnosis typically involves using a diagnostic scanner to retrieve the trouble codes, checking for other related codes, inspecting wiring connections, and performing a thorough scan of the vehicle's network modules.

4. What are some repair tips for addressing the U184A code in a Chevrolet indicating lost communication with the Body Control Module on the Low Speed CAN Bus?

- Repair tips may include checking and repairing any damaged wiring, ensuring proper connections, resetting the Body Control Module, or replacing the module if necessary.

5. Can the U184A code in a Chevrolet be cleared/reset, or does it require professional diagnosis and repair?

- The code can be cleared using a diagnostic scanner, but it is important to address the underlying issue causing the communication loss with the Body Control Module to prevent the code from reoccurring.

6. Is it safe to continue driving a Chevrolet with the U184A code related to lost communication with the Body Control Module on the Low Speed CAN Bus?

- It is not recommended to drive the vehicle with this code present, as it may affect the proper functioning of essential electronic components controlled by the Body Control Module.

7. How much does it typically cost to repair the U184A code in a Chevrolet caused by lost communication with the Body Control Module on the Low Speed CAN Bus?

- Repair costs can vary depending on the specific cause of the issue, but it is advisable to consult with a professional mechanic for an accurate diagnosis and cost estimate.

8. Can a DIY enthusiast with basic automotive knowledge fix the U184A code in a Chevrolet themselves?

- Depending on the underlying cause, some DIY enthusiasts may be able to address the issue by checking wiring connections, but it is recommended to seek professional help for a comprehensive diagnosis and repair.

9. Are there any recalls or technical service bulletins related to the U184A code in Chevrolet vehicles?

- It is advisable to check with authorized Chevrolet dealerships or online databases for any related recalls or technical service bulletins addressing the U184A code and its associated issues.

10. How can regular maintenance help prevent the occurrence of the U184A code in a Chevrolet due to lost communication with the Body Control Module on the Low Speed CAN Bus?

- Regular maintenance, including checking and cleaning wiring connections, inspecting the Body Control Module, and ensuring proper system functionality, can help prevent communication issues leading to the U184A trouble code.