OBD-II code · Network
U0231 Lost Communication with Rain Sensor Module
The wiper controller has lost the rain/light sensor module. Automatic wiping and automatic headlight switching stop working; the driver has to operate them manually.
Is it safe to drive with U0231?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyRain sensor failed
- PossibleLIN wire to sensor open
- Less likelyGateway module routing CAN messages incorrectly
Symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.3–1.5 h
- Emissions test
- Usually unaffected
- Parts involved
- Rain Light Sensor, Lin Wiring
Related codes
- U022ELost Communication With Object Detection Maintenance Control Module A
- U022FLost Communication With Object Detection Maintenance Control Module B
- U0230Lost Communication With Rear Gate Module
- U0232Lost Communication with Left Side Obstacle Detection Control Module
- U0233Lost Communication with Right Side Obstacle Detection Control Module
- U0234Lost Communication With Convenience Recall Module
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.