AutoCodes – Lexus – U0126 Lexus

U0126 Lexus 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 Lexus 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 719

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 Lexus 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 Lexus - Lost Communication with Steering Angle Sensor Module - AutoCodes.com — U0126 Lexus Code - Lost Communication with Steering Angle Sensor Module

What does this mean?

What are the Possible Causes of the DTC U0126 Lexus?

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 Lexus?

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 Lexus 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 Lexus Code

1. What are the common symptoms of OBDII code U0126 in a Lexus related to "Lost Communication with Steering Angle Sensor Module"?

- Common symptoms may include issues with the stability control system, traction control system, and steering assistance.

2. What are some possible causes of OBDII code U0126 in a Lexus?

- Possible causes include a faulty steering angle sensor module, damaged wiring or connectors, a blown fuse, or a communication network issue.

3. How can I diagnose the OBDII code U0126 in a Lexus?

- Diagnosis typically involves using a professional OBDII scanner to read the code and checking the wiring, connectors, and components related to the steering angle sensor module.

4. Can I still drive my Lexus with the U0126 code present?

- It is not recommended to drive the vehicle with the U0126 code, as it can affect the stability and safety systems of the car.

5. What are some repair tips for fixing the U0126 code in a Lexus?

- Repair tips may include checking and repairing any damaged wiring, replacing the steering angle sensor module if necessary, and ensuring all connections are secure.

6. Is it possible to reset the U0126 code in a Lexus without fixing the issue?

- While you can clear the code temporarily, it will likely reappear until the underlying issue with the steering angle sensor module is addressed.

7. Can a DIY enthusiast fix the U0126 code in a Lexus?

- Depending on your skill level and access to tools, you may be able to address simpler causes like checking connections or fuses. However, more complex issues may require professional help.

8. How much does it typically cost to repair the U0126 code in a Lexus?

- The cost of repair can vary based on the specific issue causing the code, but it may range from replacing a fuse or connector to replacing the steering angle sensor module.

9. Are there any recalls or technical service bulletins related to the U0126 code in Lexus vehicles?

- It's advisable to check with a Lexus dealership or refer to the manufacturer's website for any recalls or technical service bulletins related to the U0126 code in your specific Lexus model.

10. How can I prevent the U0126 code from occurring in my Lexus?

- Regular maintenance, checking for any signs of wiring damage, and addressing any warning lights or issues promptly can help prevent the U0126 code from occurring in your Lexus.