AutoCodes – Chevrolet – U184B 2017 Chevrolet Silverado

U184B 2017 Chevrolet Silverado Code - Lost Communication with Remote Heater and Air Conditioning 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 Heating, Ventilation, and Air Conditioning (HVAC) Control Module, Heating, Ventilation, and Air Conditioning Control Module harness is open or shorted, Heating, Ventilation, and Air Conditioning 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: U184B 2017 Chevrolet Silverado indicates Lost Communication with Remote Heater and Air Conditioning Control Module on Low Speed CAN Bus.
Common causes: Common causes include Faulty Heating, Ventilation, and Air Conditioning (HVAC) Control Module, Heating, Ventilation, and Air Conditioning Control Module harness is open or shorted, Heating, Ventilation, and Air Conditioning 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 259

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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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 U184B 2017 Chevrolet Silverado 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 U184B 2017 Chevrolet Silverado - Lost Communication with Remote Heater and Air Conditioning Control Module on Low Speed CAN Bus - AutoCodes.com — U184B 2017 Chevrolet Silverado Code - Lost Communication with Remote Heater and Air Conditioning Control Module on Low Speed CAN Bus

What does this mean?

What are the Possible Causes of the DTC U184B 2017 Chevrolet Silverado?

Faulty Heating, Ventilation, and Air Conditioning (HVAC) Control Module
Heating, Ventilation, and Air Conditioning Control Module harness is open or shorted
Heating, Ventilation, and Air Conditioning Control Module circuit poor electrical connection

How to Fix the DTC U184B 2017 Chevrolet Silverado?

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 U184B 2017 Chevrolet Silverado 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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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 U184B 2017 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code U184B in a 2017 Chevrolet Silverado?

The common symptoms of U184B include issues with the remote heater and air conditioning control, such as inoperative heating or cooling functions, and a loss of communication with the module.

2. What does the U184B code indicate in a 2017 Chevrolet Silverado?

The U184B code specifically indicates a lost communication with the remote heater and air conditioning control module on the Low Speed CAN Bus in the 2017 Chevrolet Silverado.

3. What are the possible causes of the U184B code in a 2017 Chevrolet Silverado?

Possible causes of the U184B code include wiring issues, a faulty remote heater and air conditioning control module, a defective CAN bus, or a communication error between modules.

4. How can I diagnose the U184B code in a 2017 Chevrolet Silverado?

Diagnosing the U184B code may involve checking the wiring harness for any damage, testing the remote heater and air conditioning control module, inspecting the CAN bus connections, and using a diagnostic scanner to analyze communication errors.

5. Can I continue to drive my 2017 Chevrolet Silverado with the U184B code present?

It is not recommended to drive the vehicle with the U184B code present, as it may lead to further issues with the heating and air conditioning system, affecting overall comfort and safety while driving.

6. How can the U184B code in a 2017 Chevrolet Silverado be repaired?

Repairing the U184B code may involve fixing any wiring issues, replacing the remote heater and air conditioning control module if necessary, ensuring proper connections on the CAN bus, and clearing the code with a diagnostic tool.

7. Is it possible to reset the U184B code in a 2017 Chevrolet Silverado without repairs?

While you may be able to clear the U184B code temporarily by resetting the system, it is important to address the underlying issue causing the code to prevent it from reoccurring.

8. Are there any recalls related to the U184B code in a 2017 Chevrolet Silverado?

It is advisable to check with the manufacturer or a certified dealership to inquire about any recalls or technical service bulletins related to the U184B code in the 2017 Chevrolet Silverado.

9. Can extreme weather conditions trigger the U184B code in a 2017 Chevrolet Silverado?

Extreme weather conditions can potentially exacerbate issues related to the U184B code, especially if there are preexisting wiring or module problems that are sensitive to temperature fluctuations.

10. How long does it typically take to repair the U184B code in a 2017 Chevrolet Silverado?

The repair time for the U184B code can vary depending on the specific cause of the issue. Simple fixes like reconnecting a loose wire may take less time, while replacing a faulty module could require more extensive work and time.