LX fog sensor issues

Whoa, that sounds like a cascade of problems all stemming from one thing! Frozen nozzles and the AC? Nuts! You say fog sensor... that's connected to a whole bunch of stuff. Sounds like a short circuit that is disabling multiple systems. Have you looked at the wiring harness or any plugs near the sensor itself? Could be a loose connection or corrosion causing havoc.

Good point about the wiring. I haven't dug that deep yet. Where exactly is the fog sensor located, and are there any specific plugs I should be looking for first?

Okay, so the fog sensor is usually near the interior mirror, integrated into the rain sensor assembly behind the plastic cover on the windshield. BUT with all those symptoms, I'm betting on a damaged wiring harness or a defective connector, as this also affects the air conditioning system and the mirror heating. You really should take it to a workshop - there's a TSB (Technical Service Bulletin) related to this. They can diagnose properly. My bet? Cable or plug connection. Better safe than sorry!

Thanks for the advice! Took it to the shop, and you nailed it. Turns out it was a corroded connector on the fog sensor. They cleaned it up and replaced a short section of wiring. Cost me 95€, but everything is working perfectly again.