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Thread: Y30DT - what's this sensor?

  1. #1
    Regular Member gtr1000's Avatar
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    Vehicle : Insignia

    Trim : Sri

    Engine : 140 Ecoflex S/S

    Year : 2013

    Default Y30DT - what's this sensor?

    Whilst trying to acquaint myself with the workings of the Y30DT, I came across this sensor. It's made of grey plastic, has a two pin connector and screws into the inlet manifold that goes to the rear bank of cylinders. I'm guessing it measures air temperature .

    Being curious, I took it out to have a closer look. At this point, I should have taken some pics but couldn't find the camera .

    The bit that protrudes into the manifold also appeared to be grey plastic, about 3/4" long with a domed end. It was covered in hard carbon so I cleaned it off with a fine wire brush and re-fitted it. Started the engine up and for around 5 seconds, there was a severe misfire, then all was OK.

    Do you all remember that misfire I had that I nearly cured with the drilled EGR blanking plate? Well now the misfire has totally disappeared even without the drilled blanking plate in place.

    So my curiosity has led to a big result for me as the car has never run so smooth. Might be worth the rest of you having a look to see what your sensor looks like .

  2. #2
    Regular Member Critch's Avatar
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    Vehicle : Mk1 renault scenic... I know I know but it drives

    Trim : Basic

    Engine : 1.6 16v

    Year : 2003

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    Hmmm I don't remember seeing that when I stripped mine.

    Will have to have a look at that this week.

  3. #3
    Regular Member omega63's Avatar
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    Vehicle : Insignia 2.0L CDTI SRI hatchback

    Trim : Black leather

    Engine : A20 DTJ 128 HP

    Year : 2009

    Mileage : 126,000

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    I think this sensor is the AITS, air intake temperature sensor....

  4. #4
    Regular Member benny's Avatar
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    yeah i think its the air intake temp sensor ...........im racking my brains here but i think its under the intake system on the back ...needs to be dug out so to speak ....why you looking for it ?

  5. #5
    Regular Member omega63's Avatar
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    Vehicle : Insignia 2.0L CDTI SRI hatchback

    Trim : Black leather

    Engine : A20 DTJ 128 HP

    Year : 2009

    Mileage : 126,000

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    Quote Originally Posted by gtr1000 View Post
    Whilst trying to acquaint myself with the workings of the Y30DT, I came across this sensor. It's made of grey plastic, has a two pin connector and screws into the inlet manifold that goes to the rear bank of cylinders. I'm guessing it measures air temperature .

    Being curious, I took it out to have a closer look. At this point, I should have taken some pics but couldn't find the camera .

    The bit that protrudes into the manifold also appeared to be grey plastic, about 3/4" long with a domed end. It was covered in hard carbon so I cleaned it off with a fine wire brush and re-fitted it. Started the engine up and for around 5 seconds, there was a severe misfire, then all was OK.

    Do you all remember that misfire I had that I nearly cured with the drilled EGR blanking plate? Well now the misfire has totally disappeared even without the drilled blanking plate in place.

    So my curiosity has led to a big result for me as the car has never run so smooth. Might be worth the rest of you having a look to see what your sensor looks like .
    Confirming that this sensor is the " Air intake temperature sensor ",...

  6. #6
    Regular Member gtr1000's Avatar
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    Vehicle : Insignia

    Trim : Sri

    Engine : 140 Ecoflex S/S

    Year : 2013

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    Quote Originally Posted by omega63 View Post
    Confirming that this sensor is the " Air intake temperature sensor ",...
    Another component ticked off the parts list. Cheers mate.

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