WOMS
U code network Medium severity

U0479 Invalid Data Received From "Restraints System Sensor I

The OBD2 code U0479 indicates that the vehicle's control module has received invalid or corrupted data from the restraints system sensor, which is part of the airbag system

Definition

The OBD2 code U0479 indicates that the vehicle's control module has received invalid or corrupted data from the restraints system sensor, which is part of the airbag system

Common causes

  • Faulty restraints system sensor
  • Damaged wiring or connectors in the sensor circuit
  • Poor ground connection
  • Corrupted data communication between modules
  • Malfunctioning airbag control module
  • Software issues or glitches in the vehicle's control modules
  • Interference from aftermarket devices or modifications

Common misdiagnoses

  • Faulty airbag control module
  • Wiring issues or shorts in the harness
  • Defective restraint system sensors
  • Software glitches in the vehicle's computer
  • Incorrectly installed or damaged connectors
  • Battery voltage issues
  • Faulty seat belt tensioners
  • Problems with the diagnostic tool or scan tool errors

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 multiple issues

  2. 2. Inspect Wiring and Connectors

    Visually inspect the wiring and connectors associated with the restraints system sensor. Look for signs of damage, corrosion, loose connections, or broken wires. Repair or replace any damaged components

  3. 3. Check the Restraint System Sensor

    Test the restraints system sensor itself. If you have access to a multimeter or a scan tool that can read live data, check the sensor's output to ensure it is functioning correctly

  4. 4. Inspect the Control Modules

    Ensure that the control modules (such as the airbag control module) are functioning properly. Check for any signs of damage or water intrusion

  5. 5. Clear Codes and Test Drive

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

  6. 6. Check for Software Updates

    Sometimes, manufacturers release software updates for control modules. Check if there are any updates available for the vehicle's software that may address communication issues

  7. 7. Perform a Network Test

    If the problem persists, perform a network test to check for communication issues between the various control modules. This may require specialized diagnostic equipment

  8. 8. Consult Technical Service Bulletins (TSBs)

    Look for any TSBs related to the U0479 code for your specific vehicle make and model. Manufacturers may have identified common issues and provided solutions

  9. 9. Professional Diagnosis

    If you are unable to resolve the issue after these steps, it may be necessary to consult a professional mechanic or dealership for further diagnosis. They may have access to advanced diagnostic tools and resources

  10. 10. Replace Faulty Components

    If a specific faulty component is identified (such as the restraints system sensor or control module), replace it as needed. Always remember to follow safety precautions when working with airbag systems, as they can be dangerous if mishandled. If you're unsure about any step, it's best to seek professional assistance