Vehicle Trouble Codes and Diagnostics

The U0222 OBD-II code refers to a Lost Communication With "Door Window Motor A", indicating that the vehicle's control module (often the Body Control Module or BCM) is unable to establish communication with the door window motor module. This issue can affect the operation of the power windows, typically one of the windows of the vehicle (usually associated with "Window Motor A").

The code points to a failure in communication between the control module and the "Door Window Motor A" (which usually refers to one of the power window motors).

Symptoms:

Non-functioning Power Window, Error Lights, Inoperative Window Control, Communication Error on Scan Tool

Possible Causes of U0222 Code :

• Faulty Wiring or Connection: A broken, loose, or corroded wire or connector between the BCM and the door window motor.
• Faulty Window Motor: The window motor itself may be malfunctioning and unable to communicate with the BCM.
• Faulty BCM: A malfunction in the Body Control Module may result in the loss of communication with the window motor.
• Fuses or Relays: A blown fuse or failed relay that impacts the window motor's functionality.
• CAN Bus Communication Issues: Issues with the CAN (Controller Area Network) bus could lead to communication problems between various modules, including the BCM and window motor.

How to Fix it?

Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

Common Diagnose and Repairs:

Diagnosis Steps:

• Check for Loose or Damaged Wires: Inspect wiring and connections between the BCM and the door window motor.
• Test the Window Motor: Test the motor for functionality, checking for power supply issues or failure.
• Inspect the BCM: Use a diagnostic tool to check if the BCM is working properly and communicating with other modules.
• Check Fuses and Relays: Ensure the relevant fuses and relays are intact and functioning.

Repairs:

• Fix Wiring Issues: Repair or replace any broken or corroded wires/connectors.
• Replace Faulty Motor: If the window motor is defective, replacing it may resolve the issue.
• Replace BCM or Related Modules: In cases where the BCM is faulty, it may need to be replaced.
• Check Communication Lines: If CAN bus communication issues are present, they must be resolved by fixing the network connections or replacing damaged components.