What do you feel? The windshield wipers, when set to “Auto” mode, do not sweep away water or remain at maximum speed even in light rain. Similarly, the headlights do not turn on automatically when entering a tunnel, or remain on all day in bright sunlight.
The Logic of the System: There is an optical sensor attached to the windshield (behind the rearview mirror). It emits infrared light and measures the reflection to determine if there are water droplets or if it is dark. The code C1602 indicates that the reflection coming back is impossible to read.
- Possible Solution: Check if the windshield has been replaced recently. If the silicone gel If there are air bubbles or dirt between the sensor and the glass, the sensor becomes “blind.” Another common cause is the use of very dark or poorly installed window tint that covers the sensor area. Clean the outside of the glass well; sometimes, an oil or tree resin stain directly on the sensor generates error C1602.
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