What Does U0223 Mean?
The control module has lost network communication with door window motor B. This prevents the body control module from sending commands to and receiving feedback from this window motor control module.
Common Causes
35%
Broken or frayed wires in door jamb harness
25%
Defective window motor control module
20%
Connector corrosion or poor connection at motor module
15%
Loss of power or ground to window motor module
5%
Network communication bus fault
Diagnostic Steps
1
Step 1: Examine door jamb area for wire damage, particularly in the flexible boot section between door and body
2
Step 2: Disconnect and inspect window motor B module connector for moisture, corrosion, and damaged pins
3
Step 3: Test communication with window motor B module using scan tool bidirectional controls or module scan
4
Step 4: Measure voltage at motor module connector; confirm battery voltage on power feed and proper ground (less than 0.2V to chassis)
5
Step 5: Verify CAN bus signal integrity by checking voltage on CAN High and CAN Low wires at module connector
Estimated Repair Cost
$200 - $700
Parts + labor, varies by vehicle and location
The control module has lost network communication with door window motor B. This prevents the body control module from sending commands to and receiving feedback from this window motor control module.
The most common cause of U0223 (Lost Communication With "Door Window Motor B") is: Broken or frayed wires in door jamb harness
Typical repair costs for U0223 range from $200 to $700, depending on the vehicle, location, and whether you do it yourself or go to a shop.
No critical safety concern for vehicle operation. Affected window will not function, which may create security or weather protection issues.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U0223 to identify the root cause.
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Quick Info
Category
Network
System
Body Control Network / Power Window System
Difficulty
Type
Generic (SAE)
Recommended Tools
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