Engine-Codes.com
Engine-Codes – GMC – U0164 GMC

U0164 GMC Code - Lost Communication With HVAC Control Module

Quick Answer

The U0164 GMC code indicates that there is a communication problem between the vehicle's onboard computer system and the Heating, Ventilation, and Air Conditioning (HVAC) control module. Common causes include Faulty HVAC control module, Wiring or connection issues between the control module and the vehicle's computer system, Software malfunction in the vehicle's computer system. 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
U0164 GMC indicates Lost Communication With HVAC Control Module.
Common causes
Common causes include Faulty HVAC control module, Wiring or connection issues between the control module and the vehicle's computer system, Software malfunction in the vehicle's computer system.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 06, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code U0164 GMC Description

The U0164 GMC code indicates that there is a communication problem between the vehicle's onboard computer system and the Heating, Ventilation, and Air Conditioning (HVAC) control module. This can lead to issues with the HVAC system not functioning properly, which can affect the overall comfort of the vehicle's interior. The HVAC control module is responsible for regulating the temperature, fan speed, and airflow within the vehicle, so a loss of communication with this module can result in erratic behavior or complete failure of the HVAC system.

OBDII Code U0164 GMC - Lost Communication With HVAC Control Module
U0164 GMC Code - Lost Communication With HVAC Control Module

Common Causes of U0164 GMC

  1. Faulty HVAC control module
  2. Wiring or connection issues between the control module and the vehicle's computer system
  3. Software malfunction in the vehicle's computer system
  4. Electrical interference or damage
  5. Corrosion or moisture in the connections

Symptoms of U0164 GMC

  1. Inconsistent or incorrect temperature control
  2. Air conditioning or heating not working
  3. Fan speed not responding to adjustments
  4. Dashboard warning lights related to HVAC system
  5. Loss of control over defrost or air circulation settings

How to Fix U0164 GMC

  1. Perform a diagnostic scan to confirm the U0164 code and identify the specific issue
  2. Inspect wiring and connections for any damage or corrosion
  3. Test the HVAC control module for proper functionality
  4. Repair or replace any damaged wiring or connections
  5. Reset the vehicle's computer system to clear the code and re-establish communication with the HVAC control module

Cost to Fix U0164 GMC

The cost to repair a lost communication with HVAC control module can vary depending on the specific cause of the issue and the labor rates of the auto repair shop. On average, the repair cost for this issue can range from $150 to $500, including parts and labor. It's important to consider additional diagnostic time and potential replacement parts when estimating the total repair cost. As mentioned earlier, labor rates can vary between different shops, so it's recommended to inquire about pricing before proceeding with the repair.

Need more information about the U0164 GMC code?

Need more information on how to fix the U0164 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U0164 GMC 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 U0164 GMC Code

1. What are common symptoms of the OBDII code U0164 GMC related to Lost Communication With HVAC Control Module?

- Common symptoms include the HVAC system not responding, incorrect temperature control, and issues with the air conditioning or heating.

2. What are possible causes of the U0164 code indicating Lost Communication With HVAC Control Module?

- Possible causes include a faulty HVAC control module, damaged wiring or connectors, software glitches, or a malfunctioning body control module.

3. How can I diagnose the U0164 code in my GMC vehicle?

- Diagnose the U0164 code by checking the HVAC control module connections, inspecting wiring for damage, scanning for additional trouble codes, and using a diagnostic tool to communicate with the module.

4. Is it safe to continue driving with the U0164 trouble code present?

- It is generally safe to drive with the U0164 code, but it's recommended to address the issue promptly to ensure proper functioning of the HVAC system.

5. Can I repair the U0164 code issue on my own, or do I need professional help?

- While some simple checks like inspecting connections can be done at home, diagnosing and repairing the U0164 code may require professional help due to the complexity of the HVAC control module system.

6. Are there any quick fixes for the U0164 code before taking the vehicle to a mechanic?

- Quick fixes may include checking and reseating the HVAC control module connectors, resetting the system by disconnecting the battery, or ensuring the HVAC system fuses are intact.

7. How much can I expect to pay to repair the U0164 code related to Lost Communication With HVAC Control Module?

- Repair costs for the U0164 code can vary depending on the exact cause of the issue, but expect to pay anywhere from $100 to $500 for parts and labor.

8. Will resetting the U0164 trouble code make it go away permanently?

- Resetting the U0164 code may temporarily clear the fault, but if the underlying issue causing the lost communication with the HVAC control module persists, the code is likely to return.

9. Can extreme weather conditions contribute to triggering the U0164 code in a GMC vehicle?

- Extreme temperature changes or exposure to moisture can potentially impact the HVAC control module and contribute to triggering the U0164 code in some cases.

10. Is the U0164 code specific to GMC vehicles, or can it occur in other car brands as well?

- The U0164 code indicating Lost Communication With HVAC Control Module is not specific to GMC vehicles and can occur in other car brands equipped with OBDII systems.

Discuss the causes and fixes for U0164 GMC OBDII Code

Submit a New Comment

Code U0164 GMC comments

No comments found for this page.