WOMS
U code network High severity

U0124 Lost Communication With Lateral Acceleration Sensor Module

The OBD2 code U0124 indicates that there is a loss of communication with the lateral acceleration sensor module, which is responsible for detecting side-to-side movement of the vehicle

Definition

The OBD2 code U0124 indicates that there is a loss of communication with the lateral acceleration sensor module, which is responsible for detecting side-to-side movement of the vehicle

Common causes

  • Faulty lateral acceleration sensor
  • Damaged wiring or connectors
  • Poor electrical connections
  • Failed or malfunctioning control module
  • Software issues or glitches
  • Corrosion or dirt in connectors
  • Short circuit or open circuit in the sensor circuit
  • Issues with the vehicle's power supply or ground connections

Common misdiagnoses

  • Faulty lateral acceleration sensor
  • Wiring issues or damaged connectors
  • Faulty body control module (BCM)
  • Faulty electronic stability control (ESC) module
  • Issues with the power supply or ground connections
  • Faulty ABS module
  • Software or calibration issues in the vehicle's control modules

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 leading to the lateral acceleration sensor 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. Test the Lateral Acceleration Sensor

    If accessible, test the lateral acceleration sensor for proper operation. This may involve checking the sensor's resistance or voltage output according to the manufacturer's specifications

  5. 5. If the sensor is faulty, it may need to be replaced

  6. 6. Check for Power and Ground

    Verify that the lateral acceleration sensor is receiving the correct voltage and ground. Use a multimeter to check for power at the sensor connector

  7. 7. If there is no power, trace the wiring back to the fuse box and check for blown fuses or damaged wiring

  8. 8. Inspect the CAN Bus System

    Since U0124 is a communication-related code, check the Controller Area Network (CAN) bus for issues. Look for any damaged wires or poor connections in the CAN bus network

  9. 9. Use a scan tool to monitor the CAN bus for communication errors or interruptions

  10. 10. 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 vehicle’s ECU or related modules

  11. 11. 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

  12. 12. Consult Technical Service Bulletins (TSBs)

    Look for any TSBs related to the U0124 code or the lateral acceleration sensor for your specific vehicle make and model. Manufacturers may have specific fixes or recommendations

  13. 13. Professional Diagnosis

    If the issue persists after performing the above steps, consider seeking help from a professional mechanic or dealership. They may have specialized tools and knowledge to diagnose more complex issues.Conclusion By following these troubleshooting steps, you can systematically identify and resolve the issue related to the U0124 code. Always refer to the vehicle's service manual for specific procedures and specifications related to your vehicle model