AutoCodes – Ford – U0164 Ford

U0164 Ford Code - Lost Communication With HVAC Control Module

Quick Answer

A Controller Area Network (CAN) is a vehicle bus standard designed to interconnect automotive devices without a host computer. 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 Ford 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 7,620

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 Ford Description

A Controller Area Network (CAN) is a vehicle bus standard designed to interconnect automotive devices without a host computer. Operating information and commands are exchanged among the devices. The devices have programmed information about what messages are needed to be exchanged on the serial data circuits. CAN bus uses two dedicated wires for communication. The wires are called CAN high and CAN low. When the CAN bus is in idle mode, both lines carry 2.5V. When data bits are being transmitted, the CAN high line goes to 3.75V, and the CAN low drops to 1.25V, thereby generating a 2.5V differential between the lines. Since communication relies on a voltage differential between the two bus lines, the CAN bus is NOT sensitive to inductive spikes, electrical fields, or other noise. 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 Ford - Lost Communication With HVAC Control Module - AutoCodes.com — U0164 Ford Code - Lost Communication With HVAC Control Module

What does this mean?

What are the Possible Causes of the DTC U0164 Ford?

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 Ford?

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 Ford 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 Ford Code

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

- Common symptoms include issues with the heating, ventilation, and air conditioning system such as erratic climate control, non-functioning blower motor, or lack of control over temperature settings.

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

- Possible causes may include a faulty HVAC control module, damaged wiring or connectors, a blown fuse, or a communication network issue within the vehicle.

3. How can I diagnose the U0164 code in my Ford vehicle related to Lost Communication With HVAC Control Module?

- Diagnosing the code typically involves checking the HVAC control module for power and ground, inspecting the wiring and connectors for any damage, and using a scan tool to communicate with the module for further troubleshooting.

4. What are some tips for repairing the U0164 code in a Ford due to Lost Communication With HVAC Control Module?

- Repair tips may include checking and repairing any damaged wiring, ensuring proper power and ground connections to the HVAC control module, and reprogramming or replacing the module if necessary.

5. Can the U0164 code indicating Lost Communication With HVAC Control Module in a Ford be cleared/reset without fixing the underlying issue?

- While the code can be cleared/reset using an OBDII scanner, it is recommended to diagnose and repair the root cause to prevent the code from reoccurring and ensure proper functionality of the HVAC system.

6. Is it safe to continue driving with the U0164 code related to Lost Communication With HVAC Control Module in a Ford?

- It is generally safe to drive the vehicle with this code, but it is advised to address the issue promptly to avoid potential discomfort or inconvenience with the HVAC system.

7. How much does it typically cost to repair the U0164 code indicating Lost Communication With HVAC Control Module in a Ford?

- Repair costs can vary depending on the underlying cause, but expenses may include parts replacement, labor costs, and potential diagnostic fees, which could range from $100 to $500 or more.

8. Can a DIY enthusiast with basic automotive knowledge fix the U0164 code in a Ford caused by Lost Communication With HVAC Control Module?

- Depending on the specific issue, DIY enthusiasts may be able to address simple causes such as blown fuses or loose connectors. However, more complex repairs involving module replacement or reprogramming may require professional assistance.

9. Will the U0164 code related to Lost Communication With HVAC Control Module in a Ford affect the vehicle's overall performance?

- The code itself may not impact the vehicle's drivability, but unresolved issues with the HVAC system could lead to discomfort or inconvenience for the driver and passengers.

10. How long does it typically take to repair the U0164 code due to Lost Communication With HVAC Control Module in a Ford?

- The repair time can vary based on the specific cause of the code and the complexity of the repair. Simple fixes like reconnecting a loose wire may take minutes, while more involved repairs could require several hours or even a day at a repair shop.