AutoCodes – Toyota – U0126 2017 Toyota RAV4

U0126 2017 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 2017 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 330

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 2017 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 2017 Toyota RAV4 - Lost Communication with Steering Angle Sensor Module - AutoCodes.com — U0126 2017 Toyota RAV4 Code - Lost Communication with Steering Angle Sensor Module

What does this mean?

What are the Possible Causes of the DTC U0126 2017 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 2017 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 2017 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 U0126 2017 Toyota RAV4 code?

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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 2017 Toyota RAV4 Code

1. What does the OBDII code U0126 mean on a 2017 Toyota RAV4?

U0126 indicates a loss of communication between the vehicle's control modules and the Steering Angle Sensor (SAS).

2. What are common symptoms of the U0126 code in a 2017 Toyota RAV4?

Symptoms may include the ABS or traction control light turning on, loss of stability control functionality, or erratic steering behavior.

3. What causes the U0126 code to appear on a Toyota RAV4?

Common causes include a faulty Steering Angle Sensor, damaged wiring or connectors, a malfunctioning CAN bus network, or a failing control module.

4. How is the Steering Angle Sensor related to the U0126 code?

The Steering Angle Sensor monitors the steering wheel position and communicates with various systems; if communication is lost, the U0126 code is triggered.

5. Can I drive my 2017 Toyota RAV4 with the U0126 code?

While the car may still be drivable, safety features like stability control and ABS may not function properly, so it is recommended to address the issue promptly.

6. How do you diagnose the U0126 code on a Toyota RAV4?

A technician will use a scan tool to check for communication with the Steering Angle Sensor, inspect wiring and connectors, and test the CAN bus network.

7. Can a dead battery cause the U0126 code on a 2017 Toyota RAV4?

Yes, a dead or weak battery can disrupt communication between control modules, potentially triggering the U0126 code.

8. How do you fix the U0126 code in a Toyota RAV4?

Repairs may include replacing the Steering Angle Sensor, repairing damaged wiring or connectors, or addressing issues with the CAN bus network.

9. How much does it cost to fix the U0126 code on a 2017 Toyota RAV4?

Costs can vary, but repairs typically range from $100 for minor wiring repairs to over $500 if the Steering Angle Sensor needs replacement.

10. Can the U0126 code clear itself on a 2017 Toyota RAV4?

In rare cases, the code may clear if the issue is intermittent, but it usually requires repairs and a scan tool to reset the system.

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