Invalid Data Received From Power Window Module
The U0446 code means the vehicle's onboard diagnostic system has detected: Invalid Data Received From Power Window Module. This is a low severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- moderate
- Estimated cost
- $150 - $500 (parts and labor)
Network codes mean modules are not communicating. You need a scanner that reads all systems to find the problem.
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Common Symptoms
- Window moving to wrong position
- Auto up/down feature not working
- Window moving slowly
- Window not responding to one-touch
- Express window disabled
Probable Causes (Ranked by Likelihood)
- Failed window regulator motor Very High
- Window module receiving bad data High
- CAN bus fault in door Moderate
- Window switch intermittent Low
Step-by-Step Diagnostic Procedure
-
Reset window auto feature by cycling
-
Check window switch operation
-
Scan window module for codes
-
Test regulator motor directly
Frequently Asked Questions
Can I drive with U0446?
Yes. Try resetting the auto window feature by holding the switch down, then up for 5 seconds each.
What causes U0446?
Usually a window module or switch issue. Power cycling the window often resets the auto feature.
How much does U0446 cost to fix?
Typically $150 to $500.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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