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U code network High severity

U0131 Lost Communication With Power Steering Control Module

The OBD2 code U0131 indicates that there is a loss of communication between the vehicle's control module and the power steering control module, which may affect the power steering system's functionality

Definition

The OBD2 code U0131 indicates that there is a loss of communication between the vehicle's control module and the power steering control module, which may affect the power steering system's functionality

Common causes

  • Faulty power steering control module
  • Damaged wiring or connectors
  • Poor electrical connections
  • Blown fuse
  • Faulty vehicle communication network (CAN bus)
  • Software issues or updates needed
  • Corroded terminals
  • Battery or charging system problems

Common misdiagnoses

  • Faulty power steering control module
  • Wiring issues or damaged connectors
  • Faulty steering angle sensor
  • Malfunctioning vehicle speed sensor
  • Issues with the engine control module (ECM)
  • Battery or charging system problems
  • Faulty power steering pump
  • Incorrectly calibrated or programmed modules

Troubleshooting steps

  1. 1. Check for Additional Codes

    Use an OBD-II scanner to check for any other trouble codes that may be present. This can provide more context and help identify related issues

  2. 2. Inspect Wiring and Connectors

    Visual Inspection: Check the wiring harness and connectors leading to the Power Steering Control Module (PSCM) for any signs of damage, corrosion, or loose connections

  3. 3. Connector Pins

    Ensure that the pins in the connectors are not bent, corroded, or pushed back

  4. 4. Check Power and Ground

    Power Supply: Verify that the PSCM is receiving the correct voltage. Use a multimeter to check the power supply to the module

  5. 5. Ground Connection

    Ensure that the ground connection for the PSCM is secure and functioning properly

  6. 6. Inspect the Power Steering Control Module

    Module Condition: Check the PSCM for any physical damage or signs of failure

  7. 7. Reprogramming

    If applicable, consider reprogramming or updating the software of the PSCM, as software issues can sometimes cause communication problems

  8. 8. Test Communication Lines

    CAN Bus Communication: Use a scan tool to check the communication on the CAN bus. Ensure that the PSCM is communicating with other modules in the vehicle

  9. 9. Signal Integrity

    Check for any shorts or open circuits in the communication lines

  10. 10. Check for Intermittent Issues

    Temperature Effects: Sometimes, issues can be temperature-related. If the problem occurs only under certain conditions (e.g., after the vehicle has been running for a while), this may indicate a failing component

  11. 11. Movement

    Check if the issue occurs when the vehicle is in motion or stationary, as this can help isolate the problem

  12. 12. Inspect Related Components

    Steering Column: Check for any issues with the steering column or related components that may affect the PSCM

  13. 13. Other Modules

    Ensure that other modules in the vehicle are functioning correctly, as communication issues can sometimes stem from other components

  14. 14. Clear Codes and Test Drive

    After performing the above checks and repairs, clear the trouble codes using the OBD-II scanner and take the vehicle for a test drive to see if the code returns

  15. 15. Consult Technical Service Bulletins (TSBs)

    Check for any manufacturer-specific TSBs related to the U0131 code or power steering issues, as there may be known fixes or recalls

  16. 16. Seek Professional Help

    If the issue persists after performing these steps, it may be necessary to consult a professional mechanic or technician who has experience with your specific vehicle make and model. By following these troubleshooting steps, you can systematically identify and address the root cause of the U0131 code