What Does U0231 Mean?
Communication has been lost with the Rain Sensing Module, which controls automatic windshield wiper operation based on moisture detection. The vehicle cannot receive data from the rain sensor system.
Common Causes
35%
Failed rain sensing module or sensor electronics
25%
Damaged or corroded connector at rain sensor location near rearview mirror
20%
Damaged wiring harness to rain sensor or headliner wire damage
15%
Power supply or ground circuit failure to rain sensor module
5%
Body control module communication bus fault
Diagnostic Steps
1
Step 1: Check fuse for rain sensor circuit and verify power at sensor connector
2
Step 2: Inspect rain sensor mounting area on windshield for proper installation and gel pad condition
3
Step 3: Test connector at rain sensor for corrosion, looseness, or terminal damage
4
Step 4: Verify ground circuit continuity and check for proper voltage on communication lines
5
Step 5: Replace rain sensing module if all circuits test within specifications
Estimated Repair Cost
$150 - $500
Parts + labor, varies by vehicle and location
Communication has been lost with the Rain Sensing Module, which controls automatic windshield wiper operation based on moisture detection. The vehicle cannot receive data from the rain sensor system.
The most common cause of U0231 (Lost Communication With Rain Sensing Module) is: Failed rain sensing module or sensor electronics
Typical repair costs for U0231 range from $150 to $500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Minimal safety impact. Wipers can still be operated manually. Driver should be aware automatic wiper function is not available in rain.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U0231 to identify the root cause.
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Quick Info
Category
Network
System
Body Control and Convenience
Difficulty
Type
Generic (SAE)
Recommended Tools
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