WOMS
U code network Medium severity

U1629 Invalid Data Received from Vehicle Control Module

The OBD2 code U1629 indicates that the vehicle's control module has received invalid or corrupted data from another control module in the vehicle

Definition

The OBD2 code U1629 indicates that the vehicle's control module has received invalid or corrupted data from another control module in the vehicle

Common causes

  • Faulty Vehicle Control Module (VCM)
  • Corrupted or damaged wiring harness
  • Poor electrical connections or grounds
  • Faulty communication network (CAN bus issues)
  • Software or firmware issues in the VCM
  • Malfunctioning sensors or actuators
  • Interference from aftermarket devices or modifications

Common misdiagnoses

  • Faulty Vehicle Control Module (VCM)
  • Wiring issues or shorts in the communication lines
  • Faulty sensors or actuators
  • Corrupted software or firmware in the control modules
  • Issues with the OBDII connector or communication port
  • Battery or power supply problems
  • Other unrelated control module failures

Troubleshooting steps

  1. 1. Check for Additional Codes

    Use an OBD-II scanner to check for any other trouble codes that may be present. Addressing related codes can help in diagnosing the issue

  2. 2. Inspect Wiring and Connectors

    Visually inspect the wiring and connectors associated with the VCM and any related modules. Look for signs of damage, corrosion, or loose connections

  3. 3. Ensure that all connectors are securely plugged in and that there are no bent pins

  4. 4. Check for Communication Issues

    Use a scan tool to check the communication between the VCM and other modules. If other modules are not communicating, there may be a network issue

  5. 5. Verify that the CAN (Controller Area Network) bus is functioning properly. You can use a multimeter or oscilloscope to check for proper voltage levels and signals on the CAN lines

  6. 6. Inspect the Vehicle Control Module

    If the wiring and connections are good, the issue may lie within the VCM itself. Check for any signs of physical damage or water intrusion

  7. 7. If possible, perform a software update or reset the VCM to see if that resolves the issue

  8. 8. Check for Ground Issues

    Ensure that the VCM has a good ground connection. A poor ground can lead to communication issues and invalid data being sent

  9. 9. Test the Battery and Charging System

    A weak battery or charging system can cause communication problems. Check the battery voltage and ensure that the charging system is functioning properly

  10. 10. Clear the 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

  11. 11. Consult Technical Service Bulletins (TSBs)

    Check for any TSBs related to the U1629 code for your specific vehicle make and model. Manufacturers may have specific recommendations or known issues that can help in troubleshooting

  12. 12. Seek Professional Help

    If the issue persists after performing the above steps, it may be necessary to consult a professional mechanic or technician who has experience with your vehicle's specific systems. By following these troubleshooting steps, you should be able to identify and resolve the underlying issue causing the U1629 code