AutoCodes – Toyota – U0126 2018 Toyota RAV4

U0126 2018 Toyota RAV4 Code - Lost Communication with Steering Angle 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 Steering Angle Sensor Module, Steering Angle Sensor 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: U0126 2018 Toyota RAV4 indicates Lost Communication with Steering Angle Sensor Module.
Common causes: Common causes include Faulty Controller Area Network (CAN) Communication System, Faulty Steering Angle Sensor Module, Steering Angle Sensor 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.

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Code Popularity 305

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 26, 2023

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code U0126 2018 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 Steering Angle Sensor Module has not been received.

OBDII Code U0126 2018 Toyota RAV4 - Lost Communication with Steering Angle Sensor Module - AutoCodes.com — U0126 2018 Toyota RAV4 Code - Lost Communication with Steering Angle Sensor Module

What does this mean?

What are the Possible Causes of the DTC U0126 2018 Toyota RAV4?

Faulty Controller Area Network (CAN) Communication System
Faulty Steering Angle Sensor Module
Steering Angle Sensor Module harness is open or shorted
Steering Angle Sensor Module circuit poor electrical connection

How to Fix the DTC U0126 2018 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 U0126 2018 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 U0126 2018 Toyota RAV4 Code

1. What does the OBDII code U0126 on a 2018 Toyota RAV4 mean?

The code U0126 indicates a "Lost Communication with Steering Angle Sensor Module" error in the vehicle's system.

2. What are the common symptoms of the U0126 code in a 2018 Toyota RAV4?

Common symptoms include the malfunction indicator light (MIL) turning on, loss of power steering assistance, and potential issues with the vehicle's stability control system.

3. What are the possible causes of the U0126 code in a 2018 Toyota RAV4?

Possible causes include a faulty steering angle sensor module, damaged wiring or connectors related to the sensor, or a communication error within the vehicle's network.

4. How can I diagnose the U0126 code in a 2018 Toyota RAV4?

Diagnosing the U0126 code typically involves using a diagnostic scanner to retrieve the specific error codes, checking the wiring and connectors for damage, and testing the steering angle sensor module for functionality.

5. Can I still drive my 2018 Toyota RAV4 with the U0126 code present?

It is not recommended to drive the vehicle with the U0126 code present, as it may affect the vehicle's stability control system and power steering assistance, compromising safety.

6. How can I repair the U0126 code in a 2018 Toyota RAV4?

Repairing the U0126 code may involve replacing the faulty steering angle sensor module, repairing damaged wiring or connectors, and ensuring proper communication within the vehicle's network.

7. Is it necessary to reset the error codes after repairing the U0126 code in a 2018 Toyota RAV4?

Yes, it is recommended to reset the error codes using a diagnostic scanner after repairing the U0126 code to clear the MIL and ensure proper functioning of the vehicle's systems.

8. Can the U0126 code in a 2018 Toyota RAV4 be a recurring issue?

If the root cause of the U0126 code is not properly addressed during repairs, it may become a recurring issue, leading to persistent communication errors with the steering angle sensor module.

9. Are there any DIY fixes for the U0126 code in a 2018 Toyota RAV4?

DIY fixes for the U0126 code may be limited, as proper diagnosis and repair often require specialized tools and knowledge. It is recommended to consult a professional mechanic for accurate troubleshooting and repairs.

10. How much does it cost to repair the U0126 code in a 2018 Toyota RAV4?

The cost of repairing the U0126 code can vary depending on the root cause of the issue, the need for parts replacement, and labor costs. It is advisable to obtain estimates from reputable auto repair shops for an accurate cost assessment.