WOMS
U code network High severity

U0134 Lost Communication With Power Steering Control Module Rear

The OBD2 code U0134 indicates that there is a loss of communication between the vehicle's main control module and the rear power steering control module, which may affect the functionality of the power steering system

Definition

The OBD2 code U0134 indicates that there is a loss of communication between the vehicle's main control module and the rear power steering control module, which may affect the functionality of the power steering system

Common causes

  • Faulty power steering control module
  • Damaged wiring or connectors
  • Corroded connectors
  • Faulty power steering pump
  • Low power steering fluid level
  • Malfunctioning vehicle control module
  • Software issues or updates needed
  • Electrical interference or shorts in the system

Common misdiagnoses

  • Faulty power steering control module
  • Wiring issues or damaged connectors
  • Faulty steering angle sensor
  • Battery or charging system problems
  • Faulty engine control module (ECM)
  • Issues with the vehicle's CAN bus system
  • Faulty power steering pump
  • Incorrectly calibrated or malfunctioning steering system components

Troubleshooting steps

  1. 1. Check for Additional Codes

    Use an OBD-II scanner to check for any other related trouble codes. This can provide more context and help identify if there are other issues affecting the communication

  2. 2. Inspect Wiring and Connectors

    Visual Inspection: Check the wiring harness and connectors related to the Power Steering Control Module 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

    Verify that the Power Steering Control Module is receiving the correct voltage and ground. Use a multimeter to check for proper voltage at the module's power and ground terminals

  5. 5. Inspect the Power Steering Control Module

    If the wiring and connections are intact, the issue may lie within the Power Steering Control Module itself. Check for any signs of physical damage or water intrusion

  6. 6. Test Communication Lines

    Use a scan tool to check if the Power Steering Control Module is communicating with other modules in the vehicle. If it is not, there may be a fault in the communication lines (CAN bus)

  7. 7. Check for Intermittent Issues

    Sometimes, communication issues can be intermittent. Pay attention to when the code appears (e.g., during specific driving conditions) and check for any patterns

  8. 8. Perform a Module Reset

    Disconnect the battery for a few minutes to reset the vehicle’s modules. Reconnect and see if the code reappears

  9. 9. Update Software/Firmware

    Check if there are any software updates available for the Power Steering Control Module or the vehicle’s ECU. Sometimes, manufacturers release updates to fix communication issues

  10. 10. Consult Technical Service Bulletins (TSBs)

    Look for any TSBs related to the specific make and model of the vehicle. Manufacturers may have identified common issues and provided solutions

  11. 11. Replace the Power Steering Control Module

    If all other steps have been exhausted and the issue persists, consider replacing the Power Steering Control Module. Ensure that the replacement module is compatible with your vehicle.1

  12. 12. Professional Diagnosis

    If you are unable to resolve the issue, it may be best to consult a professional mechanic or dealership for a more in-depth diagnosis.Conclusion Always remember to take safety precautions when working on a vehicle's electrical system. If you're not comfortable performing these steps, it's advisable to seek help from a qualified technician