heinzwalter2

S90 rain light sensor fault

I've got a 2023 Volvo S90 hybrid with 141900 km. I'm seeing a rain-light sensor fault stored in memory. The automatic wipers don't work in rain, automatic headlight control is disabled, speedometer dimming is inoperative, and the lights stay on. Any ideas?

A 2023 Volvo S90 hybrid experienced a rain-light sensor fault, leading to malfunctioning automatic wipers, disabled automatic headlight control, inoperative speedometer dimming, and lights staying on. The issue was identified as bubbles forming under the sensor's gel pad, disrupting sensor readings. The solution involved replacing the gel pad and recalibrating the sensor at a workshop, which resolved the problem.

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4 comment(s)

Interesting. I had a similar issue with my 2018 Audi A4. Same symptoms: auto headlights, wipers, and dimming all went haywire. For me, it turned out to be bubbles forming under the gel pad of the windshield, right where the sensor sits. This was messing with the sensor's readings.

Bubbles under the gel pad? Interesting. Did you fix it yourself, or did you need professional help? Was it expensive?

I tried to fix it myself at first, but without the right tools, I made it worse. I'd recommend a workshop. The diagnostic effort should be minimal. The repair cost me 62€.

Thanks. Seems I have the same issue with the rain sensor. The problem was indeed caused by bubbles under the sensor's gel pad. I went to my local workshop as you suggested. They replaced the gel pad and recalibrated the sensor. Now, all systems are working.

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VOLVO

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S90