AutoCodes – Lexus – U0131 Lexus

U0131 Lexus Code - Lost Communication with Power Steering Control 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 Power Steering Control Module, Power Steering Control 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: U0131 Lexus indicates Lost Communication with Power Steering Control Module.
Common causes: Common causes include Faulty Controller Area Network (CAN) Communication System, Faulty Power Steering Control Module, Power Steering Control 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 1,543

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 27, 2023

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code U0131 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 Power Steering Control Module has not been received.

OBDII Code U0131 Lexus - Lost Communication with Power Steering Control Module - AutoCodes.com — U0131 Lexus Code - Lost Communication with Power Steering Control Module

What does this mean?

What are the Possible Causes of the DTC U0131 Lexus?

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

How to Fix the DTC U0131 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 U0131 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 U0131 Lexus Code

1. What are common symptoms of OBDII code U0131 in a Lexus related to the power steering control module?

Symptoms may include loss of power steering assistance, illuminated warning lights on the dashboard, and difficulty steering the vehicle.

2. What are some potential causes of the U0131 code indicating lost communication with the power steering control module in a Lexus?

Possible causes include a faulty power steering control module, damaged wiring or connectors, low battery voltage, or issues with the CAN bus communication system.

3. How can I diagnose the U0131 trouble code in my Lexus pertaining to the power steering control module?

Diagnosis typically involves using a diagnostic scanner to retrieve the trouble codes, checking for other related codes, inspecting the wiring and connectors, and testing the power steering control module for proper functionality.

4. Is it safe to drive my Lexus with the U0131 code related to the power steering control module issue?

It is not recommended to drive the vehicle with this code present, as it can affect the power steering system and potentially lead to unsafe driving conditions.

5. What are some repair tips for fixing the U0131 code indicating lost communication with the power steering control module in a Lexus?

Repair tips may include checking and repairing any damaged wiring or connectors, resetting the power steering control module, or replacing the module if necessary.

6. Can a DIY enthusiast fix the U0131 code related to the power steering control module in a Lexus?

While some basic troubleshooting steps can be performed by DIY enthusiasts, advanced diagnosis and repairs may require professional help due to the complexity of the power steering system.

7. How much does it typically cost to repair the U0131 code issue with the power steering control module in a Lexus?

Repair costs can vary depending on the exact cause of the issue, but they may range from a few hundred to over a thousand dollars, including parts and labor.

8. Will resetting the trouble codes clear the U0131 code related to the power steering control module in my Lexus?

Resetting the trouble codes may temporarily clear the code, but if the underlying issue causing the communication loss is not fixed, the code is likely to reappear.

9. Can a weak car battery cause the U0131 code to appear in a Lexus?

Yes, a weak or failing car battery can sometimes cause communication issues between modules, including the power steering control module, leading to the U0131 trouble code.

10. How long does it typically take to repair the U0131 code associated with the power steering control module in a Lexus?

The repair time can vary depending on the exact cause of the issue and the availability of parts, but it may take anywhere from a few hours to a full day to diagnose and fix the problem.