AutoCodes – Chevrolet – U0164 Chevrolet

U0164 Chevrolet Code - Lost Communication With HVAC Control Module

Quick Answer

Modules connected to the high speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Heating, Ventilation, and Air Conditioning (HVAC) Control Module, HVAC Control Module harness is open or shorted, HVAC 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: U0164 Chevrolet indicates Lost Communication With HVAC Control Module.
Common causes: Common causes include Faulty Heating, Ventilation, and Air Conditioning (HVAC) Control Module, HVAC Control Module harness is open or shorted, HVAC 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 12,912

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 Apr 02, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0164 Chevrolet Description

Modules connected to the high speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. The modules have prerecorded information about what messages are needed to be exchanged on the serial data circuits, for each virtual network. The messages are supervised and also, some periodic messages are used by the receiver module as an availability indication of the transmitter module. The supervision time-out period is 250 ms. Each message contains the identification number of the transmitter module. The Diagnostic Trouble Code (DTC) sets when a periodic message from the Heating, Ventilation, and Air Conditioning (HVAC) Control Module has not been received.

OBDII Code U0164 Chevrolet - Lost Communication With HVAC Control Module - AutoCodes.com — U0164 Chevrolet Code - Lost Communication With HVAC Control Module

What does this mean?

What are the Possible Causes of the DTC U0164 Chevrolet?

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

How to Fix the DTC U0164 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 U0164 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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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 Chevrolet Code

1. What are common symptoms of the U0164 OBDII code related to the HVAC control module in a Chevrolet?

- Common symptoms include issues with the air conditioning or heating system not functioning properly, such as no air coming from the vents or the inability to adjust temperature settings.

2. What are possible causes of the U0164 OBDII code indicating lost communication with the HVAC control module in a Chevrolet?

- Possible causes may include a faulty HVAC control module, damaged wiring or connectors, a blown fuse, or issues with the vehicle's CAN bus communication network.

3. How can I diagnose the U0164 OBDII code related to the HVAC control module in my Chevrolet?

- Diagnosing this code typically involves using a diagnostic scan tool to communicate with the vehicle's onboard computer system and check for any stored trouble codes related to the HVAC control module.

4. Is it safe to continue driving my Chevrolet with the U0164 OBDII code indicating lost communication with the HVAC control module?

- It is not recommended to drive the vehicle with this code present, as it may lead to further issues with the HVAC system or other related components. It is best to address the problem promptly.

5. Can I repair the U0164 OBDII code in my Chevrolet related to the HVAC control module on my own?

- While some DIY enthusiasts may attempt to troubleshoot and repair this code, it is recommended to seek assistance from a qualified mechanic or dealership to accurately diagnose and fix the issue.

6. Are there any common repair tips for resolving the U0164 OBDII code associated with the HVAC control module in a Chevrolet?

- Common repair tips may include checking and repairing any damaged wiring or connectors, ensuring proper power supply to the HVAC control module, and resetting the trouble code after repairs are completed.

7. How much does it typically cost to repair the U0164 OBDII code indicating lost communication with the HVAC control module in a Chevrolet?

- The cost of repair can vary depending on the exact cause of the issue, labor rates in your area, and whether any parts need to be replaced. It is best to obtain a repair estimate from a professional technician.

8. Will resetting the U0164 OBDII trouble code related to the HVAC control module in my Chevrolet make it go away permanently?

- Simply resetting the trouble code may temporarily clear the error, but if the underlying issue causing the code is not fixed, it is likely to reappear. It is important to diagnose and address the root cause of the problem.

9. Can extreme temperatures or weather conditions contribute to the occurrence of the U0164 OBDII code in a Chevrolet's HVAC control module?

- Extreme temperatures or weather conditions may not directly cause the U0164 code, but they can potentially exacerbate existing issues with the HVAC system or related components, leading to communication problems.

10. How long does it usually take to diagnose and repair the U0164 OBDII code linked to the HVAC control module in a Chevrolet?

- The time required for diagnosis and repair can vary depending on the complexity of the issue and the availability of parts. It is recommended to consult with a professional technician for a more accurate timeframe.