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williamschulze88

Seat Tarraco Hybrid Fog Sensor Issue

I'm having a weird issue with my Seat Tarraco hybrid from . The error memory shows a fog sensor problem. Because of that, the air conditioning system doesn't switch on and the spray nozzles freeze at cold temperatures. Also, the mirror heating isn't working. I've read that the likely cause is a defective cable or plug connection. Any ideas where to start?

Summary of the thread

A Seat Tarraco hybrid was experiencing issues with the fog sensor, leading to problems with the air conditioning, spray nozzles, and mirror heating. The likely cause was identified as a defective cable or plug connection. The solution involved checking and cleaning the sensor's plug connection, located near the rearview mirror, and performing a sensor calibration. After addressing the connection issue and calibrating the sensor, the air conditioning system resumed normal operation, resolving the problem.

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4 comment(s)

LudwigSpeedy

Sounds like a faulty fog sensor. I had similar issues on my BMW (different engine, of course) where the climate control wouldn't kick in and the mirror heating was intermittent. Does the error code point specifically to the humidity sensor or is it a more general climate control fault? Also, have you checked the sensor's plug connection for corrosion or loose wires? It's located near the base of the windshield usually.

williamschulze88 (community.author)

Good point about the plug connection. Where exactly is the humidity sensor plug located? And when you mentioned sensor calibration, does that require special tools, or is it something I can do myself? I'd like to avoid the 95€ repair cost if it's just a minor thing.

LudwigSpeedy

The plug is usually directly on the sensor, which is mounted near the rearview mirror, on the windshield. As for sensor calibration, it typically requires diagnostic software. You might be able to find aftermarket tools that can do it, but I'd suggest getting it checked by a workshop. If it's a connection issue, it's a quick fix, but messing with the climate control system without the right tools can cause further problems.

williamschulze88 (community.author)

Thanks for the insights. Just got it back from the shop. Turns out it was a defective connection on the fog sensor, just like you suspected. They cleaned the contacts and did a sensor calibration. Air conditioning is working now and the error is gone. Visibility is back to normal!

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SEAT

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TARRACO