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rainerschulze1

Seat Leon outside temperature sensor fault

I'm at my wit's end. My 2000 Seat Leon with a gasoline engine (mileage: 193740 km) is throwing an outside temperature sensor fault. It's stored in the error memory, and it's causing a cascade of problems: the air conditioning system refuses to switch on, the spray nozzles freeze up at cold temperatures, and the mirror heating is completely useless. Could this all really stem from a faulty vehicle temperature sensor?

Summary of the thread

A 2000 Seat Leon was experiencing issues with the air conditioning, mirror heating, and spray nozzles due to an outside temperature sensor fault. The problem was suspected to be related to the sensor or its wiring. After diagnostics confirmed the sensor was faulty, it was replaced, resolving the issues with the car's systems.

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4 comment(s)

nicoherrmann5

That sounds like a pain! I had a similar issue with my old car. Have you checked the wiring and plug connection to the vehicle temperature sensor? That's often the culprit and an easy fix. Where is the sensor located in your car?

rainerschulze1 (community.author)

Good point! I suspected the cable or plug connection might be defective. Do you know if sensor calibration is required after sensor replacement or is it plug and play? Also, any tips on finding the sensor location?

nicoherrmann5

Yeah, a faulty sensor can definitely cause all those issues, especially if it feeds information to multiple systems. I'm not sure about the sensor calibration for your car, but it's worth asking the shop. Honestly, given the symptoms and the potential hassle, sensor diagnostics at a workshop is probably the best bet. They can pinpoint the exact problem and ensure a proper fix.

rainerschulze1 (community.author)

It was the outside vehicle temperature sensor! I had it replaced at a local shop after sensor diagnostics confirmed it. The replacement cost 95€. Now the air conditioning works, the mirror heating is functional again and I don't have to worry about frozen spray nozzles. Thanks for the help!

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SEAT

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LEON