Lost Communication With Windshield Rain Sensor Module
The U0233 code means the vehicle's onboard diagnostic system has detected: Lost Communication With Windshield Rain Sensor 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
- Automatic wipers not functioning
- Rain sensing feature disabled
- Wipers stuck on one speed
- Auto wiper indicator light off
Probable Causes (Ranked by Likelihood)
- Failed rain sensor module Very High
- Rain sensor lens contamination High
- CAN bus wiring fault to sensor Moderate
- Windshield replacement disconnected sensor Low
Step-by-Step Diagnostic Procedure
-
Inspect rain sensor lens for dirt or damage
-
Check rain sensor connector behind rearview mirror
-
Scan rain sensor module for codes
-
Verify sensor was reconnected after windshield work
Frequently Asked Questions
Can I drive with U0233?
Yes. Manual wiper controls still work. Only automatic rain sensing is lost.
What causes U0233?
Often caused by windshield replacement where the sensor was not properly reconnected.
How much does U0233 cost to fix?
Usually $150 to $500. Sensor reconnection after windshield work may be free.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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