Lost Communication with Left Window Motor
Diagnostic trouble code U0222 indicates a loss of communication between the engine control module (ECM) or body control module (BCM) and the left door window motor (Door Window Motor A). This occurs when the control module fails to receive the expected signal from the window motor over the vehicle's communication network, such as the CAN bus. The loss of communication can be caused by a faulty window motor, damaged wiring, corroded or loose electrical connections, a defective BCM, or a blown window circuit fuse.
1. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.
2. Most Common Causes
- Faulty left window motor
- Short or open circuit in the wiring
- Corroded or loose electrical connections
- Defective body control module (BCM)
- Blown fuse in the window circuit
3. Symptoms You Will Notice
- Left window does not operate
- Window operates intermittently or slowly
4. Step-by-Step Diagnosis
Check for blown fuses in the window circuit and replace if necessary.
Inspect wiring and connectors between the BCM and left window motor for damage, corrosion, or looseness.
Test the left window motor by applying direct power and ground to verify operation.
Use a scan tool to check for communication with the BCM and window motor; if no communication, suspect a faulty BCM.
5. Frequently Asked Questions
Is it safe to drive?▼
Yes, the vehicle is generally safe to drive, but the left window will not operate properly.
How much does it cost to fix?▼
Repair costs typically range from $100 to $400, depending on whether the issue is a simple fuse replacement or a more involved repair like replacing the window motor or BCM.