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charlesmoon4

Etios fog sensor malfunction

I'm having a strange issue with my 2011 Toyota Etios diesel. It's only done 26482 km. The fog sensor seems to be malfunctioning. I'm getting an error stored in the memory, and the air conditioning won't switch on. Also, the spray nozzles are freezing in cold weather, and the mirror heating isn't working. Could this all be related? I read online it could be a defective cable or plug connection somewhere. Anyone else experienced something similar?

4 comment(s)

sarahkoenig14

Sounds like you've got a bad connection somewhere. The fog sensor talks to the ECU (Engine Control Unit), which then controls a bunch of other stuff – A/C, mirror heating, even the windshield washer jets because the ECU will try to stop them freezing in low temperatures. Have you checked the connections to the sensor itself? It's usually located near the rearview mirror, behind the plastic housing.

charlesmoon4 (Author)

Thanks for the info! When you say "connections", are we talking about the plug going into the sensor itself? Is it easy enough to get to? Don't want to start pulling things apart if it's a bigger job than I can handle.

sarahkoenig14

Yeah, the plug and the wiring right near the plug. It's a common spot for corrosion or damage. The plastic housing should pop off with a little persuasion, but be gentle. If you're not comfortable, honestly, it's probably worth taking it to a workshop. My local guy said it's a pretty quick fix if it is just a connection issue, so shouldn't cost a fortune.

charlesmoon4 (Author)

Okay, thanks a lot for the advice. I think I'll take it to a workshop. They quoted me 95€ to fix it. Sounds like the connector is the problem, like you said.

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