AutoCodes – Toyota – U0126 Toyota

U0126 Toyota 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 Toyota 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 4,813

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 26, 2023

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code U0126 Toyota 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 Toyota - Lost Communication with Steering Angle Sensor Module - AutoCodes.com — U0126 Toyota Code - Lost Communication with Steering Angle Sensor Module

What does this mean?

What are the Possible Causes of the DTC U0126 Toyota?

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 Toyota?

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 Toyota 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 U0126 Toyota code?

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Information for Specific Toyota Models

U0126 2013 Toyota RAV4 — Lost Communication with Steering Angle Sensor Module
U0126 2014 Toyota RAV4 — Lost Communication with Steering Angle Sensor Module
U0126 2015 Toyota RAV4 — Lost Communication with Steering Angle Sensor Module
U0126 2016 Toyota RAV4 — Lost Communication with Steering Angle Sensor Module
U0126 2017 Toyota RAV4 — Lost Communication with Steering Angle Sensor Module
U0126 2018 Toyota RAV4 — Lost Communication with Steering Angle Sensor Module

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 Toyota Code

1. What are the common symptoms of OBDII code U0126 in a Toyota related to the Steering Angle Sensor Module?

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

2. What are the possible causes of the U0126 code indicating lost communication with the Steering Angle Sensor Module in a Toyota?

Potential causes may include a faulty steering angle sensor, damaged wiring or connectors, a software glitch, or a malfunction in the steering angle sensor module itself.

3. How can I diagnose the U0126 code in my Toyota related to the Steering Angle Sensor Module?

Diagnosis typically involves using a diagnostic scanner to retrieve the trouble codes, checking the wiring and connectors for any damage, and testing the steering angle sensor and its related components for proper functionality.

4. Can I continue driving my Toyota with the U0126 code indicating lost communication with the Steering Angle Sensor Module?

It is not recommended to drive the vehicle with this code present, as it may affect the proper functioning of the steering system and stability control, posing a safety risk.

5. How can I repair the U0126 code in my Toyota related to the Steering Angle Sensor Module?

Repair options may include repairing or replacing damaged wiring or connectors, recalibrating the steering angle sensor, updating the software, or replacing the steering angle sensor module if necessary.

6. Is it possible to reset the U0126 code in my Toyota without fixing the underlying issue with the Steering Angle Sensor Module?

Resetting the code without addressing the root cause may temporarily turn off the MIL, but the issue will likely reoccur until the underlying problem is resolved.

7. Are there any DIY tips for resolving the U0126 code in a Toyota related to the Steering Angle Sensor Module?

While some basic checks like inspecting wiring connections can be done by DIY enthusiasts, diagnosing and repairing issues related to steering angle sensors usually require specialized tools and expertise best handled by professionals.

8. How much does it typically cost to repair the U0126 code related to the Steering Angle Sensor Module in a Toyota?

Costs can vary depending on the specific issue causing the code, but repairs related to the steering angle sensor module can range from a few hundred to over a thousand dollars, including parts and labor.

9. Can extreme weather conditions or rough driving affect the occurrence of the U0126 code in a Toyota?

Extreme weather conditions or rough driving can potentially strain the steering angle sensor and related components, leading to issues that may trigger the U0126 code indicating lost communication with the Steering Angle Sensor Module.

10. Will fixing the U0126 code in my Toyota require reprogramming or relearning procedures for the steering system?

After repairing or replacing components related to the Steering Angle Sensor Module, it may be necessary to perform reprogramming or relearning procedures to ensure proper calibration and functionality of the steering system.