AutoCodes – Chevrolet – U184B 2014 Chevrolet Silverado

U184B 2014 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 2014 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 186

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code U184B 2014 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 2014 Chevrolet Silverado - Lost Communication with Remote Heater and Air Conditioning Control Module on Low Speed CAN Bus - AutoCodes.com — U184B 2014 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 2014 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 2014 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 2014 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.

Need more information about the U184B 2014 Chevrolet Silverado code?

Need more information on how to fix the U184B 2014 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U184B 2014 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area

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 2014 Chevrolet Silverado Code

What are the common symptoms of OBDII code U184B in a 2014 Chevrolet Silverado?

Common symptoms include loss of communication with the remote heater and air conditioning control module, erratic heater or air conditioning operation, and possible illumination of the check engine light.

What are the possible causes of OBDII code U184B in a 2014 Chevrolet Silverado?

Potential causes include a faulty remote heater and air conditioning control module, damaged wiring or connectors in the low-speed CAN bus circuit, or issues with the power or ground connections to the module.

How can I diagnose the issue related to OBDII code U184B in my 2014 Chevrolet Silverado?

Diagnosis involves checking the wiring and connectors for any visible damage, testing the power and ground connections to the module, and using a diagnostic scanner to communicate with the remote heater and air conditioning control module.

Can I still drive my 2014 Chevrolet Silverado with OBDII code U184B present?

It is generally safe to drive the vehicle with this code, but it is recommended to address the issue promptly to ensure proper functionality of the heater and air conditioning system.

What are some repair tips for resolving OBDII code U184B in a 2014 Chevrolet Silverado?

Repair tips include checking and repairing any damaged wiring or connectors, ensuring proper power and ground connections to the module, and potentially replacing the remote heater and air conditioning control module if deemed faulty.

Is it necessary to reset the OBDII code U184B after making repairs to a 2014 Chevrolet Silverado?

Yes, it is recommended to clear the code using a diagnostic scanner after addressing the underlying issue. This will allow the vehicle's computer to reevaluate the system and ensure the problem has been resolved.

Can weather conditions affect the occurrence of OBDII code U184B in a 2014 Chevrolet Silverado?

Extreme weather conditions, such as exposure to moisture or temperature fluctuations, can potentially impact the communication between modules and lead to the occurrence of this code. It is important to keep the vehicle protected from such conditions.

What should I do if the OBDII code U184B keeps coming back in my 2014 Chevrolet Silverado?

If the code keeps recurring after repairs, it may indicate an ongoing issue with the remote heater and air conditioning control module or the wiring/connectors. Further diagnosis and potentially seeking professional help may be necessary to fully resolve the problem.

How can I prevent OBDII code U184B from appearing in my 2014 Chevrolet Silverado in the future?

Regular maintenance checks, including inspecting the wiring and connectors, ensuring proper module function, and protecting the vehicle from extreme weather conditions, can help prevent the recurrence of this code.