WOMS
U code network High severity

U0113 Lost Communication With Emissions Critical Control Information

The OBD2 code U0113 indicates a loss of communication with the emissions critical control module, which may affect the vehicle's emissions system performance

Definition

The OBD2 code U0113 indicates a loss of communication with the emissions critical control module, which may affect the vehicle's emissions system performance

Common causes

  • Faulty wiring or connectors
  • Malfunctioning emissions control module
  • Failed or damaged sensors
  • Poor ground connections
  • Corroded or damaged connectors
  • Software issues or programming errors
  • Battery or power supply problems
  • Intermittent electrical issues

Common misdiagnoses

  • Faulty Engine Control Module (ECM)
  • Damaged wiring or connectors
  • Faulty emissions control components (e.g., EGR valve, catalytic converter)
  • Bad ground connections
  • Faulty O2 sensors
  • Issues with the vehicle's battery or charging system
  • Faulty transmission control module (TCM)
  • Software issues or updates needed for the ECM
  • Incorrectly installed aftermarket parts
  • Faulty diagnostic tools or procedures

Troubleshooting steps

  1. 1. Check for Other Codes

    Use an OBD-II scanner to check for any additional trouble codes. Other codes may provide more context or indicate related issues

  2. 2. Inspect Wiring and Connectors

    Visual Inspection: Check the wiring and connectors associated with the ECM and the emissions 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 damaged

  4. 4. Check Power and Ground

    Verify that the emissions control module is receiving proper power and ground. Use a multimeter to check voltage and ground continuity

  5. 5. Test the Emissions Control Module

    If possible, test the emissions control module for functionality. This may involve using a scan tool to communicate with the module and check for any internal faults

  6. 6. Inspect the CAN Bus

    The communication between modules often occurs over the Controller Area Network (CAN) bus. Check for any issues with the CAN bus wiring, such as shorts, opens, or interference

  7. 7. Check for Software Updates

    Sometimes, communication issues can be resolved with a software update. Check with the vehicle manufacturer for any available updates for the ECM or emissions control module

  8. 8. Clear Codes and Test Drive

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

  9. 9. Consult Technical Service Bulletins (TSBs)

    Look for any TSBs related to the specific make and model of the vehicle. Manufacturers may have issued guidance on common issues related to U0113

  10. 10. Professional Diagnosis

    If the issue persists after performing the above steps, consider seeking help from a professional mechanic or dealership. They may have specialized diagnostic tools and experience with the specific vehicle

  11. 11. Replace Faulty Components

    If a specific module or wiring issue is identified, replace the faulty component as necessary. By following these troubleshooting steps, you can systematically identify and resolve the issue related to the U0113 code