WOMS
U code network High severity

U0117 Lost Communication With PTO Control Module

The OBD2 code U0117 indicates a loss of communication with the Power Take-Off (PTO) control module, suggesting that the vehicle's onboard computer is unable to receive data from the PTO module

Definition

The OBD2 code U0117 indicates a loss of communication with the Power Take-Off (PTO) control module, suggesting that the vehicle's onboard computer is unable to receive data from the PTO module

Common causes

  • Faulty PTO control module
  • Damaged wiring or connectors
  • Poor electrical connections
  • Blown fuse
  • Faulty vehicle communication network (CAN bus)
  • Corroded terminals
  • Software issues or updates needed
  • Malfunctioning powertrain control module (PCM)

Common misdiagnoses

  • Faulty PTO Control Module
  • Wiring issues or damaged connectors
  • Faulty Engine Control Module (ECM)
  • Faulty Transmission Control Module (TCM)
  • Battery or charging system problems
  • Faulty sensors related to PTO operation
  • Software issues or programming errors
  • Grounding issues in the electrical system

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 additional context and help identify related issues

  2. 2. Inspect Wiring and Connectors

    Visual Inspection: Check the wiring harness and connectors associated with the PTO control module for any signs of damage, corrosion, or loose connections

  3. 3. Repair or Replace

    If you find any damaged wires or connectors, repair or replace them as necessary

  4. 4. Test the PTO Control Module

    Power and Ground: Ensure that the PTO control module is receiving the proper power and ground signals. Use a multimeter to check voltage and ground continuity

  5. 5. Module Functionality

    If possible, test the PTO control module itself to ensure it is functioning correctly. This may involve swapping it with a known good module if available

  6. 6. Check Communication Lines

    CAN Bus Integrity: Inspect the CAN bus lines for continuity and resistance. Ensure that there are no shorts or open circuits in the communication lines

  7. 7. Scan Tool Communication

    Use a scan tool to check if you can communicate with the PTO control module. If you cannot, it may indicate a problem with the module or the communication lines

  8. 8. Inspect Related Modules

    Since communication issues can sometimes stem from other modules, check the functionality of related control modules (e.g., engine control module, transmission control module) to ensure they are operating correctly

  9. 9. Check for Software Updates

    Verify if there are any software updates available for the vehicle’s control modules. Sometimes, communication issues can be resolved with a software update

  10. 10. Clear Codes and Test Drive

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

  11. 11. Seek Professional Help

    If the issue persists after performing the above steps, consider seeking assistance from a qualified mechanic or dealership. They may have specialized tools and knowledge to diagnose and repair the issue effectively. By following these troubleshooting steps, you can systematically identify and address the cause of the U0117 code