U0231Lost Communication With Rain Sensing Module
- Generic OBD-II code · Network
- How the car detects it
- U0231 shows that the rain sensing module on the windscreen, an optical unit that registers droplets and often ambient brightness too, no longer answers. It usually sits on a LIN line below a body or wiper controller, which stores the code. FCA bulletin 08-050-22 Rev. A (Jeep Grand Cherokee WL 2021) lists U0231-00 among a group of LIN lost communication codes that appear without a MIL and are cured by new body control module software. When the sensor is silent, automatic wiping falls back to the fixed stages and, where the same unit measures light, the automatic headlamp function can be lost. After a windscreen replacement, a loose plug behind the mirror cover is a classic cause. U0532 covers invalid data from the same sensor.
- What you may notice
- Automatic wipers inoperative, manual stages still work
- Automatic headlamps not switching
- Likely causes
- LikelySensor plug not seated after windscreen or mirror work
- PossibleBody control module software (FCA 08-050-22)
- PossibleLIN wire damaged in the headliner or A-pillar
- RareRain sensing module faulty
- Repair
- Easy · Often possible to do yourself.Typical cost: €0 – €300
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.