AutoCodes – Toyota – U0164 2016 Toyota RAV4

U0164 2016 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 2016 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 276

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 Mar 27, 2023

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code U0164 2016 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 2016 Toyota RAV4 - Lost Communication with Air Conditioner ECU - AutoCodes.com — U0164 2016 Toyota RAV4 Code - Lost Communication with Air Conditioner ECU

What does this mean?

What are the Possible Causes of the DTC U0164 2016 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 2016 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 2016 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 2016 Toyota RAV4 Code

1. What does the OBDII code U0164 for a 2016 Toyota RAV4 mean?

The code U0164 indicates a "Lost Communication with Air Conditioner ECU" error on your 2016 Toyota RAV4.

2. What are the common symptoms of a U0164 code on a 2016 Toyota RAV4?

Common symptoms of the U0164 code may include issues with the air conditioning system, such as no cold air, irregular cooling, or the AC system not working at all.

3. What are the possible causes of the U0164 code on a 2016 Toyota RAV4?

The U0164 code in a 2016 Toyota RAV4 is often caused by wiring issues, a faulty Air Conditioner ECU, a malfunctioning CAN bus communication system, or a blown fuse related to the AC system.

4. How can I diagnose the U0164 code on my 2016 Toyota RAV4?

Diagnosing the U0164 code typically involves checking the wiring connections to the Air Conditioner ECU, inspecting the condition of the ECU itself, testing the CAN bus communication, and verifying the status of relevant fuses.

5. Can I still drive my 2016 Toyota RAV4 with a U0164 code?

While it may be possible to drive your vehicle with the U0164 code, it is recommended to address the issue promptly to avoid potential long-term damage to the air conditioning system or other related components.

6. How can I repair the U0164 code on my 2016 Toyota RAV4?

Repairing the U0164 code may involve fixing any damaged wiring, replacing the Air Conditioner ECU if necessary, addressing CAN bus communication issues, and ensuring all related fuses are in working order.

7. Will resetting the U0164 code make it go away permanently on a 2016 Toyota RAV4?

Resetting the U0164 code may clear the error temporarily, but if the underlying issue causing the communication problem with the Air Conditioner ECU is not fixed, the code is likely to reappear.

8. Is it safe to reset the U0164 code on a 2016 Toyota RAV4 using an OBDII scanner?

Resetting the U0164 code with an OBDII scanner is generally safe and a common practice after making necessary repairs to see if the issue has been resolved. However, it's crucial to address the root cause of the problem to prevent future occurrences.

9. Can a DIY enthusiast fix the U0164 code on a 2016 Toyota RAV4?

Depending on their skill level and access to tools, a DIY enthusiast may be able to diagnose and repair the U0164 code on a 2016 Toyota RAV4, especially if the issue is related to wiring connections or fuse problems. However, complex issues with the Air Conditioner ECU or CAN bus system may require professional expertise.

10. How much does it cost to repair the U0164 code on a 2016 Toyota RAV4?

The cost of repairing the U0164 code on a 2016 Toyota RAV4 can vary depending on the specific cause of the issue. It may range from a simple fix like repairing wiring connections or replacing a fuse, to a more expensive repair involving the Air Conditioner ECU or CAN bus system.