Jazz fog sensor issues

Sounds like a dodgy sensor alright. When you say 'fog sensor', is that the one connected to the windshield for auto-defogging? The symptoms all being electrical points to a connection issue, especially with multiple systems failing. Worth checking the wiring harness around that sensor for any obvious damage or loose plugs.

Yeah, that's the one! The auto-defogging thing. So, wiring harness... where exactly is that located? I'm not the most mechanically gifted, but I can poke around a bit if I know where to look. And what am I looking for, exactly? Just loose connections?

Okay, so the harness will likely be routed near the base of the rearview mirror, where that sensor is usually located. Look for a multi-pin connector. 'Loose' is the key thing – give each wire a gentle wiggle to see if anything feels unstable. Also, check for corroded pins; greenish dust is a giveaway. But honestly, with all those systems affected, and since it's a hybrid, that might require a professional diagnostic check. It could be a broader CAN bus issue, and those are a pain to troubleshoot without the proper tools.

Thanks for the advice! I checked the wiring and didn't see anything obvious, so I took it to the shop. Turns out it was a defective cable/plug connection to the sensor, like you said. They fixed it for 95€. Annoying, but at least it's sorted!