AutoCodes.com
Login with Google
AutoCodes – Toyota – U0073 2013 Toyota RAV4

U0073 2013 Toyota RAV4 Code - Control Module Communication Bus Off

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 Control Module, Control Module 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
U0073 2013 Toyota RAV4 indicates Control Module Communication Bus Off.
Common causes
Common causes include Faulty Controller Area Network (CAN) Communication System, Faulty Control Module, Control Module 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.
Save to My Repairs Step-by-Step Diagnostic Guide My Repairs
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 737
How popular is this code, among other codes? Low
What is this?
Table of contents Created and updated by William Orellana on Mar 22, 2023
💬 Need more help? Ask Coddy for instant answers — it's free!

Code U0073 2013 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 message that includes the transmitter device availability has not been received.
OBDII Code U0073 2013 Toyota RAV4 - Control Module Communication Bus Off - AutoCodes.com
U0073 2013 Toyota RAV4 Code - Control Module Communication Bus Off
What does this mean?

What are the Possible Causes of the DTC U0073 2013 Toyota RAV4?

  • Faulty Controller Area Network (CAN) Communication System
  • Faulty Control Module
  • Control Module harness is open or shorted
  • Control Module circuit poor electrical connection

How to Fix the DTC U0073 2013 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 U0073 2013 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.

Need more information about the U0073 2013 Toyota RAV4 code?

Need more information on how to fix the U0073 2013 Toyota RAV4 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U0073 2013 Toyota RAV4 code diagnosed by a professional: Find a repair shop in your area

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 2013 Toyota RAV4 Code

1. What does the OBDII code U0073 mean on a 2013 Toyota RAV4?

U0073 indicates a "Control Module Communication Bus Off" fault, meaning one or more control modules have lost communication on the Controller Area Network (CAN) bus.

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

Symptoms may include the check engine light turning on, erratic vehicle behavior, malfunctioning systems (e.g., ABS, transmission, or infotainment), or a lack of response from certain modules.

3. What causes the U0073 code to appear on a 2013 Toyota RAV4?

Common causes include faulty wiring or connections in the CAN bus system, a malfunctioning control module, damaged CAN bus connectors, or issues with the vehicle's battery or ground connections.

4. Can a weak battery cause the U0073 code in my Toyota RAV4?

Yes, a weak or failing battery can cause communication issues on the CAN bus, potentially triggering the U0073 code.

5. How do I diagnose the U0073 code on a 2013 Toyota RAV4?

Start by inspecting the CAN bus wiring and connectors for damage, checking the battery voltage, and using a scan tool to identify which module is not communicating.

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

While the vehicle may still operate, driving with this code active is not recommended, as it can lead to erratic performance or failure of critical systems.

7. How do I fix the U0073 code on my Toyota RAV4?

Repairs may include fixing or replacing damaged wiring, securing loose connectors, reprogramming or replacing a faulty module, or addressing battery or grounding issues.

8. Can a blown fuse trigger the U0073 code on a 2013 Toyota RAV4?

Yes, a blown fuse associated with the CAN system can disrupt communication and trigger the U0073 code.

9. How much does it cost to repair the U0073 code on a Toyota RAV4?

Repair costs vary based on the issue, ranging from $50 for minor wiring fixes to $500 or more if a control module replacement is needed.

10. Do I need special tools to troubleshoot the U0073 code on my Toyota RAV4?

Yes, a professional-grade OBDII scan tool or diagnostic scanner capable of reading CAN bus communication is necessary for accurate diagnosis.

Discuss the causes and fixes for U0073 2013 Toyota RAV4 OBDII Code

Submit a New Comment

Code U0073 2013 Toyota RAV4 comments

No comments found for this page.

AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play