stefanshadow2
Toyota iQ Fog Sensor Problems
Summary of the thread
A 2012 Toyota iQ diesel was experiencing issues with the AC, spray nozzles, and mirror heating, all linked to a fog sensor error. The problem was suspected to be related to the fog sensor, which is part of the climate control system. A suggestion was made to check the sensor's location near the rearview mirror for loose connections. Ultimately, a corroded connector on the fog sensor was identified and resolved by a workshop, restoring the vehicle's functions.
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4 comment(s)
stefanshadow2 (community.author)
I haven't actually seen the sensor itself. Where exactly should I be looking, and what am I looking for? I'm not really sure what a fog sensor even looks like, to be honest.
oskarberger2
Okay, so the fog sensor detects humidity and helps control the climate. It's small, usually a black plastic box. Given all those symptoms, and without being able to physically check it myself, it's likely a wiring issue. A defective cable or plug connection could cause all that. Honestly, with all those systems affected, it might be best to get it checked by a workshop.
stefanshadow2 (community.author)
Thanks for the advice! Turns out you were right. Took it to a shop, and it was a corroded connector on the fog sensor. They cleaned it up and charged me 95€. Everything's working again now!
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TOYOTA
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IQ
oskarberger2
Sounds like the fog sensor is indeed the culprit. The air conditioning, spray nozzles and mirror heating are often linked to the climate control system, which relies on that sensor. Have you tried looking at the sensor itself? It's usually located near the rearview mirror, behind the plastic cover. Maybe the connector is loose?