AutoCodes – Lincoln – U0164 Lincoln

U0164 Lincoln 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 Lincoln 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 848

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

What does this mean?

What are the Possible Causes of the DTC U0164 Lincoln?

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 Lincoln?

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 Lincoln 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 Lincoln Code

1. What are common symptoms of the OBDII code U0164 in a Lincoln indicating a lost communication with the HVAC control module?

- Common symptoms include issues with the heating, ventilation, and air conditioning system not functioning properly, such as no heat or air conditioning, erratic temperature control, or non-responsive controls.

2. What are possible causes of the U0164 code in a Lincoln related to a lost communication with the HVAC control module?

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

3. How can I diagnose the U0164 code in my Lincoln for lost communication with the HVAC control module?

- Diagnose the U0164 code by checking the HVAC control module for power and ground, inspecting wiring for damage, scanning for additional trouble codes, and testing the communication network using a diagnostic tool.

4. Can a DIY enthusiast repair the U0164 code in a Lincoln on their own?

- Repairing the U0164 code may require advanced diagnostic equipment and expertise. It is recommended to consult a professional mechanic or dealership for proper diagnosis and repair.

5. Are there any quick tips for fixing the U0164 code related to lost communication with the HVAC control module in a Lincoln?

- Quick tips include checking and replacing blown fuses, ensuring all connectors are securely plugged in, and performing a battery reset to see if the code clears.

6. Is it safe to continue driving a Lincoln with the U0164 code without addressing the issue?

- It is not recommended to continue driving with the U0164 code present, as it can lead to further problems with the HVAC system and potentially affect other vehicle functions.

7. How much does it typically cost to repair the U0164 code in a Lincoln caused by lost communication with the HVAC control module?

- Repair costs for the U0164 code can vary depending on the underlying cause. It is advisable to obtain a diagnosis from a mechanic to determine the exact repair cost.

8. Can extreme weather conditions contribute to triggering the U0164 code in a Lincoln?

- Extreme weather conditions may exacerbate existing issues with the HVAC system, potentially leading to the U0164 code being triggered due to communication disruptions.

9. Will resetting the OBDII system clear the U0164 code in a Lincoln?

- Resetting the OBDII system may temporarily clear the code, but if the underlying issue causing the lost communication with the HVAC control module is not addressed, the code is likely to reappear.

10. How long does it typically take to diagnose and repair the U0164 code in a Lincoln at a dealership or auto repair shop?

- The time to diagnose and repair the U0164 code can vary depending on the specific issue. It is advisable to consult with the service provider for an estimated timeline.