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U0131 Toyota 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 Toyota 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 4,391
How popular is this code, among other codes? Low
What is this?
Table of contents Created and updated by William Orellana on Mar 27, 2023
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Code U0131 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 Power Steering Control Module has not been received.
OBDII Code U0131 Toyota - Lost Communication with Power Steering Control Module - AutoCodes.com
U0131 Toyota Code - Lost Communication with Power Steering Control Module
What does this mean?

What are the Possible Causes of the DTC U0131 Toyota?

  • 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 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 U0131 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 U0131 Toyota code?

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Need Help with the Code?

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Information for Specific Toyota Models

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 Toyota Code

1. What does the OBDII code U0131 mean on a Toyota?

The U0131 code indicates a loss of communication with the Power Steering Control Module (PSCM), meaning the module is not receiving or transmitting data to the vehicle's network.

2. What are common symptoms of the U0131 code in a Toyota?

Symptoms may include a loss of power steering assist, a stiff steering wheel, the power steering warning light turning on, or difficulty steering at low speeds.

3. What causes the U0131 code to appear on a Toyota?

Common causes include a faulty Power Steering Control Module, damaged wiring or connectors, a blown fuse, or issues with the CAN (Controller Area Network) bus system.

4. Can you drive a Toyota with a U0131 code?

While technically possible, driving with a U0131 code can be dangerous due to the loss of power steering assist, making the vehicle harder to steer, especially at low speeds.

5. How do you diagnose the U0131 code on a Toyota?

Diagnosis involves checking the wiring and connectors for damage, testing the Power Steering Control Module, and using a scan tool to verify communication on the CAN bus network.

6. How is the U0131 code fixed in a Toyota?

Repairs may include replacing the Power Steering Control Module, repairing or replacing damaged wiring, reconnecting loose connectors, or addressing CAN bus network issues.

7. Does a U0131 code always mean the Power Steering Control Module is bad?

No, the issue can also stem from wiring problems, faulty connectors, or a network communication issue rather than a defective module.

8. What tools are needed to troubleshoot a U0131 code on a Toyota?

You may need a scan tool capable of reading manufacturer-specific codes, a multimeter for testing circuits, and wiring diagrams for the power steering system.

9. Can a low battery cause the U0131 code in a Toyota?

Yes, a weak or low battery can cause communication errors, including the U0131 code, as insufficient voltage can disrupt module operation.

10. How much does it cost to fix a U0131 code on a Toyota?

The repair cost varies depending on the cause but can range from $100 to $1,500, with module replacement being on the higher end of the spectrum.

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