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I think I remember reading somewhere that the exhaust temperature sensor was fitted to european EA82T's (and obviously also some Japanese models as that's where my motor is from) and it's function was to prevent excessive exhaust temperatures in the event of sustained high speed motoring (I guess t...

I forgot to mention that the device is "Hitachi TWG-1"

Interesting, my EA82T has 02 sensor and exhaust temperature sensor but it doesn't have a connector that looks like that!! From your description of the location of the sensor it sounds like the 02 sensor that you are talking about. The exhaust temperature sensor on my vehicle is located on the botto...

Dit some time ago a downloas from this site about a 1986 XT turbo. It fits remarkably well my 1986 turbo wagon. Seen there a "Exhaust Temperature Switch" is it the one on the picture or is it an O2 sensor ? What is the purpose ? On the general electrical engine electronics no more any mention or ref...