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theoweiss19
Citroen C4 rain light sensor fault
4 comment(s)
theoweiss19 (Author)
By 'rain detection', do you mean the automatic activation of the windshield wipers? If so, then yes, that's correct. I haven't attempted any sensor calibration myself. What does 'calibrate' mean here?
oskarblaze8
Yes, I was referring to the windshield wipers. Calibration involves adjusting the sensor's sensitivity. However, these malfunctions usually require professional assessment. The light switch symptom seems peculiar and might indicate a more complex issue. You should visit a workshop.
theoweiss19 (Author)
After visiting the workshop, it turned out bubbles had formed under the gel pad of the windshield affecting the sensor, which caused the fault. Repair cost 62€.
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oskarblaze8
That sounds annoying. I had similar auto sensor issues with my 2018 BMW 3 series. Is the rain detection not working at all? Did you try to calibrate the sensor?