AutoCodes – Toyota – U0164 2014 Toyota RAV4

U0164 2014 Toyota RAV4 Code - Lost Communication with Air Conditioner ECU

Quick Answer

The Controller Area Network (CAN) is a standard bus system in vehicles that enables the connection of automotive devices without the need for a host computer. Common causes include Faulty Controller Area Network (CAN) Communication System, Faulty Air Conditioner ECU, Air Conditioner ECU harness is open or shorted. 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 2014 Toyota RAV4 indicates Lost Communication with Air Conditioner ECU.
Common causes: Common causes include Faulty Controller Area Network (CAN) Communication System, Faulty Air Conditioner ECU, Air Conditioner ECU harness is open or shorted.
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 579

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 Mar 27, 2023

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code U0164 2014 Toyota RAV4 Description

The Controller Area Network (CAN) is a standard bus system in vehicles that enables the connection of automotive devices without the need for a host computer. The exchange of operating information and commands among devices is facilitated by pre-programmed information about the required message exchange on the serial data circuits. Communication is carried out using two dedicated wires, known as CAN high and CAN low, with both lines carrying 2.5V when the CAN bus is in idle mode. During the transmission of data bits, the CAN high line increases to 3.75V while the CAN low drops to 1.25V, creating 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 Air Conditioner ECU has not been received.

OBDII Code U0164 2014 Toyota RAV4 - Lost Communication with Air Conditioner ECU - AutoCodes.com — U0164 2014 Toyota RAV4 Code - Lost Communication with Air Conditioner ECU

What does this mean?

What are the Possible Causes of the DTC U0164 2014 Toyota RAV4?

Faulty Controller Area Network (CAN) Communication System
Faulty Air Conditioner ECU
Air Conditioner ECU harness is open or shorted
Air Conditioner ECU circuit poor electrical connection

How to Fix the DTC U0164 2014 Toyota RAV4?

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 does this mean?

Code Tech Notes

When there are problems with the way different systems in a vehicle communicate with each other using a technology called Controller Area Network (CAN) communication, Diagnostic Trouble Codes (DTC) are displayed. These codes can be caused by issues with the main bus or branch of the communication network, or with the Electronic Control Units (ECUs) and sensors that make up the different systems. If you see code for both the CAN communication problems and internal or power source problems at the same time, you should focus on fixing the internal or power source problems first.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U0164 2014 Toyota RAV4 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 2014 Toyota RAV4 Code

1. What are the common symptoms of OBDII code U0164 in a 2014 Toyota RAV4?

- Common symptoms include the air conditioner not working properly, lack of communication with the air conditioner ECU, and possibly other related electrical issues.

2. What does the OBDII code U0164 "Lost Communication with Air Conditioner ECU" indicate in a 2014 Toyota RAV4?

- This code indicates a communication problem between the vehicleâ€™s onboard computer system and the air conditioner Electronic Control Unit (ECU).

3. What are the possible causes of the U0164 code in a 2014 Toyota RAV4?

- Possible causes include a faulty air conditioner ECU, damaged wiring or connectors, a blown fuse, software glitches, or issues with the vehicleâ€™s CAN bus communication system.

4. How can I diagnose the U0164 code in a 2014 Toyota RAV4?

- Diagnosis typically involves checking the wiring and connectors for damage, verifying the fuse related to the air conditioner system, and using a diagnostic scanner to communicate with the ECU for further troubleshooting.

5. What are some repair tips for resolving the U0164 code in a 2014 Toyota RAV4?

- Repair tips may include checking and repairing any damaged wiring or connectors, ensuring the fuse related to the air conditioner system is intact, and reprogramming or replacing the air conditioner ECU if necessary.

6. Can the U0164 code in a 2014 Toyota RAV4 be fixed without professional help?

- While simple checks like verifying fuses can be done by DIY enthusiasts, diagnosing and repairing issues related to the U0164 code may require professional expertise and specialized tools.

7. Is it safe to continue driving a 2014 Toyota RAV4 with the U0164 code present?

- It is generally not recommended to drive the vehicle with unresolved U0164 code issues, as it may lead to further electrical problems or affect the proper functioning of the air conditioning system.

8. How much does it typically cost to repair the U0164 code in a 2014 Toyota RAV4?

- The cost of repair can vary depending on the root cause of the issue. It may range from a simple fuse replacement to more complex repairs involving ECU replacement, which can be more costly.

9. Are there any recalls or technical service bulletins related to the U0164 code in a 2014 Toyota RAV4?

- It's advisable to check with authorized Toyota service centers or online databases for any recalls or technical service bulletins related to the U0164 code in the 2014 Toyota RAV4, as manufacturers may provide guidance on known issues.

10. How can I prevent the U0164 code from recurring in my 2014 Toyota RAV4?

- Regular maintenance, timely diagnosis of any electrical issues, and addressing them promptly can help prevent the U0164 code from recurring in your 2014 Toyota RAV4.