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U0123 2013 Toyota RAV4 Code - Lost Communication with Yaw Rate Sensor Module

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 Yaw Rate and Acceleration Sensor (Airbag Sensor Assembly), Yaw Rate and Acceleration Sensor 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: U0123 2013 Toyota RAV4 indicates Lost Communication with Yaw Rate Sensor Module.
Common causes: Common causes include Faulty Controller Area Network (CAN) Communication System, Faulty Yaw Rate and Acceleration Sensor (Airbag Sensor Assembly), Yaw Rate and Acceleration Sensor 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 254

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 25, 2023

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code U0123 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 periodic message from the Yaw Rate and Acceleration Sensor (Airbag Sensor Assembly) has not been received.

OBDII Code U0123 2013 Toyota RAV4 - Lost Communication with Yaw Rate Sensor Module - AutoCodes.com — U0123 2013 Toyota RAV4 Code - Lost Communication with Yaw Rate Sensor Module

What does this mean?

What are the Possible Causes of the DTC U0123 2013 Toyota RAV4?

Faulty Controller Area Network (CAN) Communication System
Faulty Yaw Rate and Acceleration Sensor (Airbag Sensor Assembly)
Yaw Rate and Acceleration Sensor harness is open or shorted
Yaw Rate and Acceleration Sensor circuit poor electrical connection

How to Fix the DTC U0123 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 U0123 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.

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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 U0123 2013 Toyota RAV4 Code

1. What does the OBDII code U0123 for a 2013 Toyota RAV4 indicating "Lost Communication with Yaw Rate Sensor Module" mean?

This code indicates a communication problem between the vehicle's onboard computer and the yaw rate sensor module, which is responsible for measuring the vehicle's rate of rotation around its vertical axis.

2. What are common symptoms associated with OBDII code U0123 in a 2013 Toyota RAV4?

Common symptoms include the illumination of the check engine light, traction control system malfunction, stability control issues, and possible loss of vehicle stability during driving.

3. What are the possible causes of the U0123 code in a 2013 Toyota RAV4?

Potential causes include a faulty yaw rate sensor module, damaged wiring or connectors related to the module, a malfunctioning ABS module, or a communication error within the vehicle's network.

4. How can I diagnose the U0123 code in my 2013 Toyota RAV4?

Diagnosis typically involves using a diagnostic scanner to retrieve the specific error codes, checking the wiring and connectors for damage, and testing the yaw rate sensor module and related components for proper functionality.

5. Can I still drive my 2013 Toyota RAV4 with the U0123 code present?

It is not recommended to drive the vehicle with the U0123 code present, as it may affect the vehicle's stability control systems, leading to potential safety hazards. It's advisable to have the issue diagnosed and repaired promptly.

6. How can I repair the U0123 code in my 2013 Toyota RAV4?

Repair methods may include replacing the faulty yaw rate sensor module, repairing damaged wiring or connectors, resetting the error codes, and ensuring proper communication between the modules in the vehicle.

7. Is it safe to reset the U0123 code in my 2013 Toyota RAV4 without fixing the underlying issue?

Resetting the code without addressing the root cause is not recommended, as the problem will likely reoccur, potentially compromising the vehicle's stability control and safety systems.

8. How much does it typically cost to repair the U0123 code in a 2013 Toyota RAV4?

The cost of repair can vary depending on the exact cause of the issue, but it may involve parts replacement, labor costs, and diagnostic fees. It's advisable to consult with a qualified mechanic for an accurate estimate.

9. Can the U0123 code in a 2013 Toyota RAV4 be a DIY fix?

While some basic checks like inspecting wiring and connectors can be done by DIY enthusiasts, diagnosing and repairing the U0123 code often requires specialized tools and expertise. It's recommended to seek professional help for proper resolution.

10. Will the U0123 code affect my 2013 Toyota RAV4's overall performance?

The U0123 code may impact the vehicle's stability control systems, potentially affecting its handling and safety features. It's essential to address the issue promptly to ensure optimal performance and safety while driving.