AutoCodes – Chevrolet – U184B 2015 Chevrolet Silverado

U184B 2015 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 2015 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 218

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 2015 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 2015 Chevrolet Silverado - Lost Communication with Remote Heater and Air Conditioning Control Module on Low Speed CAN Bus - AutoCodes.com — U184B 2015 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 2015 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 2015 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 2015 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 2015 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code U184B in a 2015 Chevrolet Silverado?

- Common symptoms include issues with the remote heater and air conditioning control module, such as erratic climate control settings or the inability to control the HVAC system.

2. What does the code U184B indicate in a 2015 Chevrolet Silverado?

- This code signifies a lost communication with the remote heater and air conditioning control module on the Low Speed CAN Bus network.

3. What are some possible causes of the U184B code in a 2015 Chevrolet Silverado?

- Potential causes may include a faulty remote heater and air conditioning control module, damaged wiring or connectors, a malfunctioning CAN Bus network, or a communication error between modules.

4. How can I diagnose the U184B code in my 2015 Chevrolet Silverado?

- Diagnosis typically involves using a diagnostic scanner to retrieve the code, checking for any related trouble codes, inspecting wiring and connectors for damage, and testing the communication between modules.

5. What are some repair tips for fixing the U184B code in a 2015 Chevrolet Silverado?

- Repair may involve repairing or replacing damaged wiring or connectors, reprogramming modules if necessary, or replacing the remote heater and air conditioning control module.

6. Can I continue driving my 2015 Chevrolet Silverado with the U184B code?

- It is not recommended to continue driving with this code unresolved, as it may lead to further issues with the HVAC system or other vehicle functions.

7. How much does it typically cost to repair the U184B code in a 2015 Chevrolet Silverado?

- The cost of repair can vary depending on the exact cause of the issue, but it may involve expenses for parts, labor, and diagnostic services.

8. Is the U184B code a common issue in 2015 Chevrolet Silverado vehicles?

- While it may not be extremely common, issues related to lost communication with modules on the CAN Bus network can occur in various vehicle models, including the 2015 Chevrolet Silverado.

9. Can the U184B code be cleared/reset without fixing the underlying issue?

- Clearing the code without addressing the root cause may temporarily remove the warning light, but the issue will likely reoccur until the underlying problem is resolved.

10. How can I prevent the U184B code from appearing in my 2015 Chevrolet Silverado in the future?

- Regular maintenance, including checking and maintaining the vehicle's electrical system, can help prevent issues like lost communication codes from occurring.