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U0073 2017 Toyota RAV4 Code - Control Module Communication Bus Off

Quick Answer

The U0073 code in a 2017 Toyota RAV4 indicates a problem with the Control Module Communication Bus. Common causes include Damaged wiring or connectors in the communication network, Faulty control module, Software glitch in one of the modules. 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
U0073 2017 Toyota RAV4 indicates Control Module Communication Bus Off.
Common causes
Common causes include Damaged wiring or connectors in the communication network, Faulty control module, Software glitch in one of the modules.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 14, 2024
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Code U0073 2017 Toyota RAV4 Description

The U0073 code in a 2017 Toyota RAV4 indicates a problem with the Control Module Communication Bus. This code typically means that the communication network between various control modules in the vehicle has been disrupted or lost. The communication bus is responsible for transmitting data between different modules, such as the engine control module, transmission control module, anti-lock brake system, airbag system, and more. When this communication is interrupted, it can lead to various issues with the vehicle's performance and functionality.

OBDII Code U0073 2017 Toyota RAV4 - Control Module Communication Bus Off
U0073 2017 Toyota RAV4 Code - Control Module Communication Bus Off

Common Causes of U0073 2017 Toyota RAV4

  1. Damaged wiring or connectors in the communication network
  2. Faulty control module
  3. Software glitch in one of the modules
  4. Power supply issues to the modules
  5. Water damage or corrosion in the connectors

Symptoms of U0073 2017 Toyota RAV4

  1. Check Engine Light illuminated
  2. ABS Light illuminated
  3. Airbag Light illuminated
  4. Issues with starting the vehicle
  5. Limp mode activation

How to Fix U0073 2017 Toyota RAV4

  1. Perform a thorough inspection of the wiring and connectors in the communication network.
  2. Check for any visible signs of damage or corrosion and repair or replace as needed.
  3. Use a diagnostic scanner to communicate with the control modules and identify the faulty module.
  4. Replace the faulty control module if necessary.
  5. Clear the trouble codes and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix U0073 2017 Toyota RAV4

The cost of repairing a U0073 code in a 2017 Toyota RAV4 can vary depending on the specific cause of the issue. On average, the repair costs can range from $200 to $500, including parts and labor. However, it's important to note that the actual cost may be higher if multiple modules need to be replaced or if extensive wiring repairs are required. Additionally, the diagnosis time and labor rates at auto repair shops can vary, so it's recommended to check with local shops for a more accurate estimate.

What does this mean?

Tech Notes for U0073 2017 Toyota RAV4

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.

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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 U0073 2017 Toyota RAV4 Code

1. What does the OBDII code U0073 on a 2017 Toyota RAV4 mean?

The U0073 code in a 2017 Toyota RAV4 indicates a Control Module Communication Bus Off error.

2. What are the common symptoms of the U0073 code in a 2017 Toyota RAV4?

Common symptoms of the U0073 code may include issues with communication between control modules, dashboard warning lights, and potential problems with vehicle performance.

3. What are the possible causes of the U0073 code in a 2017 Toyota RAV4?

Potential causes of the U0073 code include faulty wiring, loose connections, damaged control modules, or issues with the communication network within the vehicle.

4. How can I diagnose the U0073 code in my 2017 Toyota RAV4?

Diagnosing the U0073 code may involve using an OBDII scanner to read the code, checking the wiring and connections between control modules, and performing a thorough inspection of the communication network.

5. How can I repair the U0073 code in my 2017 Toyota RAV4?

Repairing the U0073 code may involve repairing or replacing damaged wiring, securing loose connections, resetting the control modules, or replacing any faulty control modules.

6. Can I drive my 2017 Toyota RAV4 with the U0073 code present?

It is not recommended to drive your vehicle with the U0073 code present, as it may lead to further communication issues between control modules and potentially affect the overall performance and safety of the vehicle.

7. How much does it cost to repair the U0073 code in a 2017 Toyota RAV4?

The cost of repairing the U0073 code in a 2017 Toyota RAV4 can vary depending on the underlying cause of the issue, the extent of the repairs needed, and labor costs at the repair shop.

8. Will clearing the U0073 code make it go away permanently?

Clearing the U0073 code may temporarily remove the warning light, but if the underlying issue causing the code is not addressed, the code is likely to reappear once the vehicle is driven again.

9. Can a DIY enthusiast fix the U0073 code in a 2017 Toyota RAV4?

While some aspects of diagnosing and repairing the U0073 code may be within reach of a DIY enthusiast, it is recommended to seek professional help for thorough diagnosis and proper repair to avoid further complications.

10. How often does the U0073 code occur in a 2017 Toyota RAV4?

The U0073 code is relatively uncommon in a 2017 Toyota RAV4, but it can occur due to various factors affecting the communication between control modules.

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